Oil-Based Drilling Fluid Plugging Method for Strengthening Wellbore Stability of Shale Gas
Finding out the reasons for wellbore instability in the Longmaxi Formation and Wufeng Formation and putting forward drilling fluid technical countermeasures to strengthen and stabilize the wellbore are very crucial to horizontal drilling. Based on X-ray diffraction, electron microscope scanning, lin...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/6674574 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832550535447707648 |
|---|---|
| author | Pengcheng Wu Chengxu Zhong Zhengtao Li Zhen Zhang Zhiyuan Wang Weian Huang |
| author_facet | Pengcheng Wu Chengxu Zhong Zhengtao Li Zhen Zhang Zhiyuan Wang Weian Huang |
| author_sort | Pengcheng Wu |
| collection | DOAJ |
| description | Finding out the reasons for wellbore instability in the Longmaxi Formation and Wufeng Formation and putting forward drilling fluid technical countermeasures to strengthen and stabilize the wellbore are very crucial to horizontal drilling. Based on X-ray diffraction, electron microscope scanning, linear swelling experiment, and hot-rolling dispersion experiment, the physicochemical mechanism of wellbore instability in complex strata was revealed, and thus, the coordinated wellbore stability method can be put forward, which is “strengthening plugging of micropores, inhibiting filtrate invasion, and retarding pressure transmission.” Using a sand bed filtration tester, high-temperature and high-pressure plugging simulation experimental device, and microporous membrane and other experimental devices, the oil-based drilling fluid treatment agent was researched and selected, and a set of an enhanced plugging drilling fluid system suitable for shale gas horizontal well was constructed. Its temperature resistance is 135°C and it has preferable contamination resistibility (10% NaCl, 1% CaCl2, and 8% poor clay). The bearing capacity of a 400 μm fracture is 5 MPa, and the filtration loss of 0.22 μm and 0.45 μm microporous membranes is zero. Compared with previous field drilling fluids, the constructed oil-based drilling fluid system has a greatly improved plugging ability and excellent performance in other aspects. |
| format | Article |
| id | doaj-art-0de545097c22429b86137cf83b02df31 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-0de545097c22429b86137cf83b02df312025-02-03T06:06:29ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/66745746674574Oil-Based Drilling Fluid Plugging Method for Strengthening Wellbore Stability of Shale GasPengcheng Wu0Chengxu Zhong1Zhengtao Li2Zhen Zhang3Zhiyuan Wang4Weian Huang5Shale Gas Research Institution of PetroChina Southwest Oil & Gas Field Company, Chengdu, 610056 Sichuan, ChinaShale Gas Research Institution of PetroChina Southwest Oil & Gas Field Company, Chengdu, 610056 Sichuan, ChinaShale Gas Research Institution of PetroChina Southwest Oil & Gas Field Company, Chengdu, 610056 Sichuan, ChinaShale Gas Research Institution of PetroChina Southwest Oil & Gas Field Company, Chengdu, 610056 Sichuan, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, ChinaFinding out the reasons for wellbore instability in the Longmaxi Formation and Wufeng Formation and putting forward drilling fluid technical countermeasures to strengthen and stabilize the wellbore are very crucial to horizontal drilling. Based on X-ray diffraction, electron microscope scanning, linear swelling experiment, and hot-rolling dispersion experiment, the physicochemical mechanism of wellbore instability in complex strata was revealed, and thus, the coordinated wellbore stability method can be put forward, which is “strengthening plugging of micropores, inhibiting filtrate invasion, and retarding pressure transmission.” Using a sand bed filtration tester, high-temperature and high-pressure plugging simulation experimental device, and microporous membrane and other experimental devices, the oil-based drilling fluid treatment agent was researched and selected, and a set of an enhanced plugging drilling fluid system suitable for shale gas horizontal well was constructed. Its temperature resistance is 135°C and it has preferable contamination resistibility (10% NaCl, 1% CaCl2, and 8% poor clay). The bearing capacity of a 400 μm fracture is 5 MPa, and the filtration loss of 0.22 μm and 0.45 μm microporous membranes is zero. Compared with previous field drilling fluids, the constructed oil-based drilling fluid system has a greatly improved plugging ability and excellent performance in other aspects.http://dx.doi.org/10.1155/2021/6674574 |
| spellingShingle | Pengcheng Wu Chengxu Zhong Zhengtao Li Zhen Zhang Zhiyuan Wang Weian Huang Oil-Based Drilling Fluid Plugging Method for Strengthening Wellbore Stability of Shale Gas Geofluids |
| title | Oil-Based Drilling Fluid Plugging Method for Strengthening Wellbore Stability of Shale Gas |
| title_full | Oil-Based Drilling Fluid Plugging Method for Strengthening Wellbore Stability of Shale Gas |
| title_fullStr | Oil-Based Drilling Fluid Plugging Method for Strengthening Wellbore Stability of Shale Gas |
| title_full_unstemmed | Oil-Based Drilling Fluid Plugging Method for Strengthening Wellbore Stability of Shale Gas |
| title_short | Oil-Based Drilling Fluid Plugging Method for Strengthening Wellbore Stability of Shale Gas |
| title_sort | oil based drilling fluid plugging method for strengthening wellbore stability of shale gas |
| url | http://dx.doi.org/10.1155/2021/6674574 |
| work_keys_str_mv | AT pengchengwu oilbaseddrillingfluidpluggingmethodforstrengtheningwellborestabilityofshalegas AT chengxuzhong oilbaseddrillingfluidpluggingmethodforstrengtheningwellborestabilityofshalegas AT zhengtaoli oilbaseddrillingfluidpluggingmethodforstrengtheningwellborestabilityofshalegas AT zhenzhang oilbaseddrillingfluidpluggingmethodforstrengtheningwellborestabilityofshalegas AT zhiyuanwang oilbaseddrillingfluidpluggingmethodforstrengtheningwellborestabilityofshalegas AT weianhuang oilbaseddrillingfluidpluggingmethodforstrengtheningwellborestabilityofshalegas |