After logging was completed Tuesday 7th of June was work at well head finalized and by 7 pm the drilling operation at IDDP-1 was formally closed and Týr drill rig decommissioned. For the next weeks water will be injected into the well, while the next steps of heating and well testing are being considered. This is thus the final daily news announcement from drilling IDDP-1 and we would like to send our regards to all that have been following the developments at IDDP-1 for the past months.
A final step test was run late last night. With a T and P tool at 2050 m depth in the well flow was increased from 20 to 40 L/s. A quick estimate of the data suggests an Injectivity Index of 2.2 to 2.4 L/s. Following the step test a final CBL-log was run. This logging finished around 7:00 am this morning.
As previously reported the first CBL was conducted yesterday. The log established a probable TOC at ~725 m. Later in the afternoon the crew prepared to cement on top. This was completed yesterday at 17:42 when cement slurry returned of surface after pumping 17.8 m3 into the annulus. The volume was less than expected based on the TOC as seen in the CBL-log from yesterday. Today a second CBL-log will be run. After the CBL-log is completed the crew will turn its attention to the BOP stack and the wells main valve which will be replaced by an ANSI 2500 valve.
After finishing the cement job last night the cement has been given some time to set and harden. This morning loggers have been obtaining data on the bonding (CBL). A pressure tool was left in the well overnight and pulled out this morning, showing no indications that the behaviour of the well has changed following the cement job.
The cement tool was pulled out of the well last night after pressure testing. After POOH, the poor condition of the cement tool was confirmed. This morning loggers from ISOR were gathering additional data on the well and on the behaviour of the water table as a function of pumping, as a part of the preparation for the cement job. After the test was completed the crew started the cement job. The first two hours after cementing, the behaviour of the well was as expected. A CBL is planned early tomorrow morning, after 12 hours of setting.
Last night and this morning the crew had problems with inflating the casing packer. Several lines of attack were tried. Early this morning the crew had some success. The packer was inflated and seemed to behave as expected. This morning various methods of cementing the casing were under discussion. They included reverse circulation cementation. These were put on hold and the casing packer tested.
Due to a technical problem we had to pull the cement string out of hole this morning. While the string was out of hole the opportunity was used to pump a tracer substance into the well. This test is a continuation of tests that have been ongoing in the Krafla area this summer. An international team will be monitoring the production wells over the next weeks and months to look for the return of the injected tracer. The crew was ready to run in with the string again this afternoon. We now expect to cement the casing around midnight, tonight.
Running of the 9 5/8" casing and liner was completed at 05:00 this morning. The crew is now making the necessary preparations for running in with a cement string. We expect to cement the casing later today.
This morning preparations for running the 9 5/8" production casing with a 9 5/8" liner have been ongoing. Early this morning a team arrived from Norway to manage the use of the annulus packer and the Peak C-Flex unit. The Peak C-Flex is a sleeve based cementing valve which allows you controlled access to the casing to casing annulus without reducing the integrity of the casing string. The casing and liner will be emplaced in a single run.
Yesterday tests on the well continued late into the night. At the same time the crew has been preparing for the next phase of the project, the running of the production casing. As could be expected, the events over the last few days have neccessitated a re-design of certain aspects of the well.
After the lithology logging programme it was decided to run a 3-fold step test in the well. The test was carried out yesterday and last night. Today further testing is underway. The step test yesterday involved the following steps: 1. Increase pumping (Q) from 40 l/s to 55 l/s. 2. Increase Q from 55 l/s to 70 l/s. 3. Decrease Q from 70 l/s to 40 l/s. During the test P and T data were collected at 2050 m depth. The data suggest an injectivity index of 8 to 15 L/s/bar.
Quenched glass came up with the circulation after the string got stuck on 24th of June, which indicates that the string got stuck due to invation of melt into the hole. This would also explain why the string was lifted by some 35 tonne. After having cooled the well for 24 hours was attempted to pull in the string and it was all loose. Subsequently was commenced to POOH. POOH was completed at 11:15 pm last night. There was no glass on the bit and it was in good condition. Some black colouration could be seen on the stabilizers and the anderdrift tool. The hole is currently being logged. The refractive index of the glass shards confirms that the melt that invaded the hole is acidic in composition (rhyolite).
The drill string got stuck at 2:18 pm yesterday afternoon with bit at 2095 m depth. By then was the hole 2104.4 m deep. On this occasion there is still flow through string, so during the night have been pumped 60-65 L/s on string, while pumping down polymer pills. There has occasionally been return of circulation otherwise is there total LOC in the hole. Currently is a short step test being performed.
Depth at 7:30 this morning is 2098 m. Yesterday was total LOC at 2071 m. After attempting to seal the leakage with mud pills and LCM material was resumed to drill. There was unsteady return of circulation but since 2094 m depth has been drilled in total LOC with 40 L/s flow through string and 10 L/s on annulus.
Drilling resumed at 2 pm yesterday afternoon. Depth is 2049 m at 8 am. At last connection at 2044 m depth inclination was 3°. There was no loss of circulation in hole until at 2044 m depth, but there circulation loss measured 11 L/s.
POOH was completed at 10 pm last night. The motor was removed from BHA and then was RIH again with a new drill bit. At 7:30 am this morning drill bit is at 1300 m depth, but it is expected that drilling will resume in the afternoon.
At 8:45 am this morning was decided to stop drilling at 1992 m depth. Now is being prepared to POOH due to indications that the drill bit appears to be worn out.
Sliding to sidetrack out of hole is in progress. At 7:30 am is depth 1979.5 m. The cuttings comprise cement and up to 30% basaltic rock fragments with cement coating. This is in good correspondence with that at this interval was expected to drill through cemented debris fill from the section drilled with 16-1/2" drill bit.
Time drilling at 1969 m depth started at 03:45 this morninng. Prior to time drilling the tool-pusher tested the hardness of the sement by drilling one meter and found that at 5 tonnes on bit the ROP was 15 m/hr.
After running in yesterday the BHA was giving pressure signals that were difficult to explain. It was thought they could either be from the motor or ander-drift. After drilling ~10 m below shoe a gyro-run was attempted. The internal temperature sensor showed that the temperature inside the string increased more rapidly than expected and the log had to be abandoned. A temperature log was then run to cofirm the T reading from the gyro-tool. Due to the pressure signals from the BHA it was decided to POOH and examine the motor and anderdrift inclinometer.
Drill string was run into hole last night. Top of upper cement plug was at 1935 m depth. Today a spot for sidetrack has been chosen. A gyro-logging will be carried out before sidetrack drilling commences.
The crew cemented on top of fish last night with string at 2050 m depth. Volume of cement for plug was 14 m3. After cementing TOC was at 1998 m depth. After laying down the plug the driller pulled back and checked for loss of circulation, there were no losses. Laying down a second plug was completed before lunch. A total of 6,3 m3 were pumped into the well. This should suffice to put TOC 20 m above the shoe. Putting together a string for sidetrack will commence later today or tonight.
As reported yesterday, backing off resulted in detachment at ~500 m depth. After pulling out the drillers needed to attend to some maintenance on the rig, a common occurrence after prolonged periods of jaring. For the record it is also noted that a second attempt of using acid to dissolve cement in the string and around the fish had been abandoned at this juncture. At 16:40 the crew was ready to run in with the string again to try to hook onto the fish. At 21:15 the crew successfully backed off and POOH began. Early this morning the crew started to run in with a cement-string. After running in with 100 m of fibreglass it became apparent that there were still problems with cement residue in the string and hence POOH again. After cleaning out the fibreglass singles running in of the cement string started again just after 10:00 o’clock this morning.
Late last night preparations for pumping acid into the well were finalized. Shortly before 24:00 the acid was pumped into the well. During pumping the end of the drill string was 1.20 m above the fish. At 04:00 this morning the string was connected to the fish again. The fish was still stuck. A slight change was noticed though as ~1 L/s can be pumped through the string at 100 bar pressure. This morning preparation for a second acid batch began. Unfortunately backing off resulted in a very low hook load implying that we unscrewed at ~500 m depth. We are now POOH to examine the threading of the bottom single.
The RIH was finished at about 11 pm last night when drill string reached the fish at 2071.5 m. Soon thereafter the string had been screwed together with the fish, the anderdrift sub to the anderdrift. Since then the string has been pulled and pushed without noticable movement of the fish. Flow through the string is still blocked, making the task of getting the fish unstuck that much harder.
At 5:50 pm yesterday afternoon after all the drill string had been torqued up and back-off had just started, the string became loose. POOH started immediately and was finished overnight after 4 am. When the POOH ended, it became clear that the joint between the anderdrift and a sub above it had been unscrewed, and that a 17 m long fish was left in the hole. Temperature logging is finished and more logs will follow.
Despite considerable effort the drill string remains SIH (Stuck In Hole) and no progress has been made in moving the drill bit upwards. Flow through the string is blocked. An obstruction has been located at 1665 m inside the string and found to be made of cement.
Drilling in rock started at 6:30 pm yesterday and this morning at 5:30 am the depth was 2103.8 m. LOC had been increasing and finally complete from 2076 m. When 2103.8 m were reached, it was decided to POOH but when one drillpipe had been removed this morning at about 7 am the string got stuck. At that point the drill bit was at 2090 m. Attempts are now being made to get the string unstuck.
TOC was reached yesterday evening and drilling started at 10:40 pm at 1970 m. At first the cement was highly firm but has been getting softer. At 7:30 am this morning the drill bit is at 2024 m. There has been no loss of circulation.
TOC was reached yesterday evening and drilling started at 10:40 pm at 1970 m. At first the cement was highly firm but has been getting softer. At 7:30 am this morning the drill bit is at 2024 m. There has been no loss of circulation.
Cement was pumped into the bottom of the hole yesterday afternoon in order to close off a leaking zone and fill up a cavity near the end of the anchor casing. Measurments after the first attempt showed loss of cement into the rock as the cement level had subsided down to 2002 m. Cement slurry was pumped down a second time overnight and now it is believed that the hole has been sealed off. POOH is currently in progress.
Cement was pumped into the bottom of the hole yesterday afternoon in order to close off a leaking zone and fill up a cavity near the end of the anchor casing. Measurments after the first attempt showed loss of cement into the rock as the cement level had subsided down to 2002 m. Cement slurry was pumped down a second time overnight and now it is believed that the hole has been sealed off. POOH is currently in progress.
At 4:10 pm yesterday afternoon drilling was stopped at 2060 m depth. The hole was clean after rinsing for 1 hour. POOH was completed by 3:30 am and after an injectivity test are preparations underway to RIH with cement string.
At 4:10 pm yesterday afternoon drilling was stopped at 2060 m depth. The hole was clean after rinsing for 1 hour. POOH was completed by 3:30 am and after an injectivity test are preparations underway to RIH with cement string.
Based on the suspicions that there was junk in the hole it was decided to RIH with a 12 1/8" tricone steel drill bit that is specially designed for junk cleaning as well as a junkbasket. While waiting for the delivery of the drill bit from Reykjavik it was decided to use the time to assess the cement behind the anchor casing from below 1300 m depth with a CBL log. CBL logging was completed by 3:50 pm. By then the drill bit had arrived at drill site and RIH could commence. Drill bit and junk basket reached fill at 2039 m depth at 2:30 am this morning. After checking depth of fill drilling could commence. The plan is to drill to 2060 m depth and then POOH to plug the hole with cement.
Based on the suspicions that there was junk in the hole it was decided to RIH with a 12 1/8" tricone steel drill bit that is specially designed for junk cleaning as well as a junkbasket. While waiting for the delivery of the drill bit from Reykjavik it was decided to use the time to assess the cement behind the anchor casing from below 1300 m depth with a CBL log. CBL logging was completed by 3:50 pm. By then the drill bit had arrived at drill site and RIH could commence. Drill bit and junk basket reached fill at 2039 m depth at 2:30 am this morning. After checking depth of fill drilling could commence. The plan is to drill to 2060 m depth and then POOH to plug the hole with cement.
Spot coring commenced at 5:00 pm yesterday. Initially ROP was averaging 5 m/h, but at 2042 m depth there was a sharp increase in ROP and after that there was little progress. At 8:20 pm coring was suspended at 2042,7 m depth and POOH commenced. POOH was completed at 5:30 this morning. The drill bit was totally worn down and there was no core in the barrel. Temperature and caliper logging was carried out this morning.
Spot coring commenced at 5:00 pm yesterday. Initially ROP was averaging 5 m/h, but at 2042 m depth there was a sharp increase in ROP and after that there was little progress. At 8:20 pm coring was suspended at 2042,7 m depth and POOH commenced. POOH was completed at 5:30 this morning. The drill bit was totally worn down and there was no core in the barrel. Temperature and caliper logging was carried out this morning.
At 4:10 pm yesterday depth reached 2040 m and then drilling was stopped for coring. The hole was rinsed until 1.2 m of fill was left in hole. POOH commenced at 11 pm and was completed around 7 am this morning. RIH with coring assembly is in progress.
At 4:10 pm yesterday depth reached 2040 m and then drilling was stopped for coring. The hole was rinsed until 1.2 m of fill was left in hole. POOH commenced at 11 pm and was completed around 7 am this morning. RIH with coring assembly is in progress.
Grinding down and rinsing out fill is in progress. At midnight thickness of the fill was 8 m, at 5:20 m this morning the fill was 5.2 m in thickness. There was total loss of circulation for a short while at 1995 m depth yesterday afternoon and again later in the evening, but this morning was pumped 11 L/s and there is full return.
Grinding down and rinsing out fill is in progress. At midnight thickness of the fill was 8 m, at 5:20 m this morning the fill was 5.2 m in thickness. There was total loss of circulation for a short while at 1995 m depth yesterday afternoon and again later in the evening, but this morning was pumped 11 L/s and there is full return.
Yesterday afternoon TOC was found at 1892 m depth with a sinker bar and additionally was checked that there was no further leakage. POOH commenced at 5 pm and this was completed by 10:55 pm. Next was RIH with 12¼” drill bit and this morning at 7:45 am is bit at 1800 m depth.
Yesterday afternoon TOC was found at 1892 m depth with a sinker bar and additionally was checked that there was no further leakage. POOH commenced at 5 pm and this was completed by 10:55 pm. Next was RIH with 12¼” drill bit and this morning at 7:45 am is bit at 1800 m depth.
POOH was completed at 6 pm yesterday afternoon. Then was tempearture and caliper logged. Logging was completed at 11 pm. RIH with string for cementing got underway at 1 am this morning, but the lowermost 63 m of the string consists of glass fiber singles. At 7:30 am is string at 1500 m depth.
POOH was completed at 6 pm yesterday afternoon. Then was tempearture and caliper logged. Logging was completed at 11 pm. RIH with string for cementing got underway at 1 am this morning, but the lowermost 63 m of the string consists of glass fiber singles. At 7:30 am is string at 1500 m depth.
Yesterday, the fill-in debris was drilled keeping ROP of 2 m/hr and circulation of 30 L/s. At midnight the string got stuck at 2001 m depth for 45 minutes. At 4:30 am, this morning, 2015.8 m depth was reached. Since then the hole has been cleaned with water and polymer pills. Fill-in debris seem to accumlate very easily in the hole. This morning at c. 8 am, a total loss of circulation occured. The plan is to cement a plug in the hole. At 10 am POOH started.
Yesterday, the fill-in debris was drilled keeping ROP of 2 m/hr and circulation of 30 L/s. At midnight the string got stuck at 2001 m depth for 45 minutes. At 4:30 am, this morning, 2015.8 m depth was reached. Since then the hole has been cleaned with water and polymer pills. Fill-in debris seem to accumlate very easily in the hole. This morning at c. 8 am, a total loss of circulation occured. The plan is to cement a plug in the hole. At 10 am POOH started.
