2021 Vol. 38, No. 4

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FORUM
Application Prospect of Magnetic Fluids in Drilling Fluids and Completion Fluids
GUANG Xinjun
2021, 38(4): 397-403. doi: 10.12358/j.issn.1001-5620.2021.04.001
Abstract(907) HTML (410) PDF (978KB)(113) [Cited by] (2)
Abstract:
Magnetic fluid, a kind of intelligent material, has both the mobility of liquids and the magnetism of solid magnetic materials, and is widely used in auto industry, mechanical engineering, construction field and aerospace industry etc. It also shows good application prospect in oil and gas industry....
DRILLING FLUID
Study on High Temperature Stability of Invert Emulsion
LIU Gang, JIANG Chao, LI Chao, LIU Xuejing, DU Na, HOU Wanguo
2021, 38(4): 404-411. doi: 10.12358/j.issn.1001-5620.2021.04.002
Abstract(985) HTML (575) PDF (1536KB)(112) [Cited by] (11)
Abstract:
The effects of the oil/water interface activity and temperature on two emulsifiers RHJ-I and RHJ-II were studied. An invert emulsion (W/O) was formulated with a synthetic oil (made in China) as the base oil, 25% CaCl2 solution as the water phase and a certain amount of Ca(OH)2. The composition of th...
An Environmentally Friendly High Temperature Water Based Drilling Fluid for Hot-Dry-Rock Well Drilling
LIU Chang, XU Jie, RAN Hengqian
2021, 38(4): 412-422. doi: 10.12358/j.issn.1001-5620.2021.04.003
Abstract(1025) HTML (385) PDF (1070KB)(87) [Cited by] (9)
Abstract:
As the traditional energy reserves are declining, the development of new energy, such as hot-dry-rock, is becoming more and more popular. Hot-dry-rock wells have high bottom hole temperatures and are very deep, and sometimes are drilled directionally. Furthermore, some hot-dry-rock wells are located...
A Viscosity Reducer for Oil Based Drilling Fluids and Its Field Application
MING Xiansen, TAO Huaizhi, CHEN Junbin, LUO Taotao
2021, 38(4): 423-427. doi: 10.12358/j.issn.1001-5620.2021.04.004
Abstract(959) HTML (471) PDF (691KB)(104) [Cited by] (11)
Abstract:
Invasion of low quality solids, especially the low density solids is one of the major factors causing the thickening of high density oil based drilling fluids. The low quality solids in an oil based drilling fluid, when in contact with the wetting agents and emulsifiers therein, attain a certain deg...
Drilling Fluid Technology for Plugging and Strengthening Formations with Narrow Mud Weight Windows in Deep Water Drilling
LI Zhong, CHEN Haodong, LIU Hexing, LYU Kaihe, BAI Yingrui
2021, 38(4): 428-434. doi: 10.12358/j.issn.1001-5620.2021.04.005
Abstract(874) HTML (373) PDF (736KB)(83) [Cited by] (4)
Abstract:
Formations drilled in deep water drilling are generally poorly compacted and have narrow safe mud weight windows, and mud losses in drilling these formations hence occur frequently. To solve these problems, a flexible particle plugging agent was developed with vinyl monomers, a macromolecular crossl...
Preparation and Plugging Performance of Zwitterionic Polymer Gel Micro Spheres
LIU Fengbao, YAN Lili, NI Xiaoxiao, JIANG Guancheng, CUI Xin, WANG Jianhua
2021, 38(4): 435-441. doi: 10.12358/j.issn.1001-5620.2021.04.006
Abstract(1000) HTML (415) PDF (969KB)(79) [Cited by] (9)
Abstract:
A kind of zwitterionic polymer gel micro spheres have been prepared through suspension polymerization to address the deficiency of plugging capacity of oil based drilling fluids. The raw materials used in the polymerization include N , N -dimethyl acrylamide (DAM), 2-acrylamido-2-methyl propane sulf...
Research on A Water-based Drilling Fluid for Shale Gas Drainage and Strong Blocking
KANG Yuan, SUN Jinsheng, LYU Kaihe, LIU Jingping, ZHANG Wenchao, TENG Yuxiang, XIU Zhuoyang, HUANG Ning
2021, 38(4): 442-448. doi: 10.3969/j.issn.1001-5620.2021.04.007
Abstract(801) HTML (410) PDF (1370KB)(88) [Cited by] (7)
Abstract:
The shale formation of the Longmaxi Formation in Sichuan is highly water sensitive,with micro-cracks and cracks developed. During the drilling process, the shaft wall collapsed frequently,which severely restricted the efficient development of shale gas.In order to solve the above problems, this pape...
An Environmentally Friendly Oil Base Mud
LIU Yongfeng, ZHANG Weiguo, DI Mingli, CHEN Bin, ZUO Kun, WANG Shunwen, KE Dian
2021, 38(4): 449-455. doi: 10.3969/j.issn.1001-5620.2021.04.008
Abstract(910) HTML (362) PDF (797KB)(80) [Cited by] (10)
Abstract:
Mineral oils and several oil base mud additives presently in use are highly biologically toxic and the discharge of oil base muds formulated with them are prohibited or limited. To minimize the toxicity of oil base muds, an environmentally friendly oil base mud was formulated with a weakly biologica...
Analysis of the Mode and Mechanisms of Destabilization of Micro Foams
YANG Qianyun, WANG Baotian, YANG Hua, ZHAO Huaizhen
2021, 38(4): 456-461. doi: 10.12358/j.issn.1001-5620.2021.04.009
Abstract(692) HTML (333) PDF (780KB)(44) [Cited by] (7)
Abstract:
Micro-foam fluid destabilizes in three ways: separation of the liquid phase, settlement, or both. In our study the effects of several factors on the way of foam destabilization were studied, including the viscosity and gel strengths of the micro-foam, the molecular weight of the foam stabilizer, spe...
An Anti-Collapse Drilling Fluid with Strong Inhibitive and Plugging Capacity for Use in the Fuxian Block in Ordos Basin
CHEN Xiaohua, QIU Zhengsong, FENG Yongchao, BAO Dan
2021, 38(4): 462-468. doi: 10.12358/j.issn.1001-5620.2021.04.010
Abstract(860) HTML (372) PDF (968KB)(95) [Cited by] (16)
Abstract:
Borehole wall instability was encountered in drilling the Liujiagou formation, the Shiqianfeng formation and the Shihezi formation in the Fuxian block, and the mechanisms of the instability were investigated and revealed through studies on three aspects, namely, the mineral composition, microstructu...
Field Application of a Plugging Borehole Wall Anti-Collapse Agent XZ-OSD in the Piedmont Structural Belt on the South Margin of Junggar Basin
FU Chaosheng, AO Tian, YU Jiashui, JIANG Guancheng, XIE Chunlin, KONG Dechang, YANG Lili
2021, 38(4): 469-473. doi: 10.12358/j.issn.1001-5620.2021.04.011
Abstract(762) HTML (323) PDF (850KB)(54) [Cited by] (6)
Abstract:
Borehole wall collapse and mud losses have been occurring during drilling operation in the piedmont structural belt on the south margin of Junggar Basin. By experimentally analyzing the rock samples and drilled cuttings taken from the target drilling area, the borehole wall collapse mechanisms were ...
A New Method of Predicting the Bridging Lost Circulation Materials and Their Particle Size Distribution
ZHU Jinzhi, REN Lingling, LU Haiying, WU Xiaohua, WANG Gui
2021, 38(4): 474-478. doi: 10.3969/j.issn.1001-5620.2021.04.012
Abstract(668) HTML (349) PDF (873KB)(64) [Cited by] (16)
Abstract:
Accurate and rapid prediction of the types of lost circulation materials (LCMs) and their particle size distribution (PSD) plays a key role in the digital and intelligent design of bridging lost circulation material slurry. A new method of characterizing and rapid predicting the bridging lost circul...
Drilling Fluid Technology for the Third Interval of Well Changtan-1 in Jilin Oilfield
LIU Tengjiao, YU Yang, ZENG Xiangyu, SHANG Wangtao, WANG Yu, XU Yongqiang, WANG Qinglin
2021, 38(4): 479-485. doi: 10.12358/j.issn.1001-5620.2021.04.013
Abstract(773) HTML (316) PDF (637KB)(64) [Cited by] (3)
Abstract:
The well Changtan-1, 5400 m in total depth, is an exploratory well drilled in the Changling rift, south of the Songliao Basin. The third interval of this well penetrated formations with high temperatures and igneous formations which are sloughing in nature. The mud used to drill these formations had...
CEMENTING FLUID
Mechanical Properties and Microstructure of Self-healing Oil Well Cement
LIU Rengguang
2021, 38(4): 486-491. doi: 10.12358/j.issn.1001-5620.2021.04.014
Abstract(802) HTML (379) PDF (3316KB)(35) [Cited by] (4)
Abstract:
The mechanical properties and microstructure of self-healing cement were studied. The adding amount of self -healing emulsion was 0, 5%, 10%, 15% and 20% respectively. The samples were cured under the condition of 90 degrees in the water for 3 days. The results showed that the elastic modulus of cem...
Research for low shear rheological properties of low return velocity cementing drilling fluid in Kuqa Piedmont
ZHANG Xiayu, AI Zhengqing, WEN Zhiming, ZHANG Feng, XU Liqun, LIU Rui, ZHANG Xingguo
2021, 38(4): 492-498. doi: 10.3969/j.issn.1001-5620.2021.04.015
Abstract(779) HTML (376) PDF (2171KB)(45) [Cited by] (2)
Abstract:
In view of the fact that the drilling fluid is in the low shear flow state during the fourth spud in ultra-high pressure gas well in Kuqa mountain front of Tarim Basin, the rheological model and rheological parameters of the drilling fluid were fitted by the rheological test data of the full shear r...
The Adaptability and Application of a Water Non-Dispersible Cement Slurry
WANG Jianyao, YANG Kunpeng, MEI Mingjia
2021, 38(4): 499-503. doi: 10.12358/j.issn.1001-5620.2021.04.016
Abstract(792) HTML (312) PDF (2006KB)(64) [Cited by] (3)
Abstract:
There has long been a water invasion and channeling problem in the water injection blocks and high water cut formations in Changqing oilfield which always happened during and/or after well cementing. To deal with this problem, the field adaptability of the anti-dispersing flocculant BCY-100L was stu...
FRACTURING FLUID & ACIDIZING FLUID
Preparation of Salt Tolerant Suspension Dispersion Polymer System and its Application in Brine-based Variable Viscosity Slippery Water System
LIU Fujian, WANG Lixiang, DU Liangjun, LIU Ting, ZHANG Lei, LIU Bin
2021, 38(4): 504-509. doi: 10.12358/j.issn.1001-5620.2021.04.017
Abstract(666) HTML (541) PDF (2350KB)(57) [Cited by] (3)
Abstract:
In this paper, the zwitterionic polymer molecule P-DHZ containing double tailed hydrophobic monomer was developed by aqueous solution polymerization system. Its viscosity average molecular weight is more than 10 million. It owns excellent salt resistance, drag reduction and gelling properties. It ca...
Study and Application of a Low Damaging Drag Reducing Hydrophilic Suspension
WANG Pengxiang, ZHANG Xiangfeng, ZHANG Dandan
2021, 38(4): 510-516. doi: 10.3969/j.issn.1001-5620.2021.04.018
Abstract(609) HTML (361) PDF (5971KB)(59) [Cited by] (4)
Abstract:
A new low damaging hydrophilic suspension dissolvable in alcohol solvents was developed to solve the problems encountered in field application of polymer drag reducers such as long time of hydration and low solubility of the drag reducers, and problems encountered in using hydrophobic suspensions su...
Study on Characterization of the Performance of Fracturing Fluids in Large Scale Volumetric Fracturing
ZHANG Danian, CHENG Xingsheng, LI Yongping, REN Xiaoke, WEN Xin, HAN Chaolimen
2021, 38(4): 517-524. doi: 10.3969/j.issn.1001-5620.2021.04.019
Abstract(646) HTML (346) PDF (2682KB)(53) [Cited by] (2)
Abstract:
In the national standard “The evaluation measurement for properties of water based fracturing fluid” (SY/T 5107-2016), the shearing history of a fracturing fluid in large scale volumetric fracturing and the high shear rate of the fracturing fluid when it passes through a perforation cannot be simula...
COMPLETION FLUID
Ultra-High Temperature Workover Fluid with Flexible Rubber Particles Used in Shunbei Oilfield
KANG Hongbing, NIU Chengcheng, JIA Hu, GAO Dingxiang, DAI Changlou
2021, 38(4): 525-530. doi: 10.3969/j.issn.1001-5620.2021.04.020
Abstract(694) HTML (351) PDF (2667KB)(50) [Cited by] (3)
Abstract:
The conventional viscosified workover fluid used in the high temperature oil and gas wells in Shunbei Oilfield is easy to lose its viscosity. To solve this problem, a new workover fluid containing flexible rubber particles that is able to resist 180 ℃ was developed based on the fact that the viscosi...

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