2023 Vol. 40, No. 3

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DRILLING FLUID
Study and Application on Risk Stratification of Wellbore Collapse For the Longmaxi Formation Shale in Zhaotong City
ZHANG Qixing, HOU Bing, WU An'an, YANG Henglin, FU Li, QIU Xiaojiang
2023, 40(3): 279-288. doi: 10.12358/j.issn.1001-5620.2023.03.001
Abstract(831) HTML (289) PDF (5697KB)(148) [Cited by] (3)
Abstract:
The national shale gas demonstration block was in Zhaotong city, where the distribution of limestone was uneven. These complex downhole accidents, such as collapse failure and cavernous leakage, sticking of bit, overflow, gas invasion, and leakage, were frequent when high-density oil-based drilling ...
Application of Polymer Based on Amino Ionic Liquid as Anti-high Temperature Inhibitor and the Mechanism
REN Yanjun, CHEN Huan, YANG Hong
2023, 40(3): 289-295, 302. doi: 10.12358/j.issn.1001-5620.2023.03.002
Abstract(767) HTML (277) PDF (5239KB)(142) [Cited by] (2)
Abstract:
A copolymer (PAN) base on amino ionic liquid and acrylamide were synthesized and used as the inhibitors for inhibiting clay hydration under high temperature condition. The molecular structure of PAN was characterized using infrared spectroscopy. The inhibition properties of PAN were evaluated by imm...
A Model for Hard Brittle Mudstone Collapse Pressure Computation Based on Rock Dilation Strength Criteria
XING Xuesong, YU Baohua, WANG Hengyang, WU Zhiqiang, PANG Zhaoyu
2023, 40(3): 296-302. doi: 10.12358/j.issn.1001-5620.2023.03.003
Abstract(682) HTML (274) PDF (2812KB)(99) [Cited by] (2)
Abstract:
Under low confining pressures, a hard brittle mudstone is easy to dilate before the stress acted on the mudstone reaches its peak value. When the stress is greater than the dilation strength of the shale, the weakening of the mudstone by the hydration of the drilling fluid becomes fast and outstandi...
Synthesis and Application of Polyether Fatty Acid Rheology Modifier for Oil-based Drilling Fluids
LUO Chunzhi, ZHANG Chujun, WANG Yidi, WANG Yuezhi, LI Haibiao, TAN Tianyu, ZHANG Bo
2023, 40(3): 303-312. doi: 10.12358/j.issn.1001-5620.2023.03.004
Abstract(789) HTML (254) PDF (3248KB)(120) [Cited by] (5)
Abstract:
Oil-based drilling fluids have low gel strengths and pipe sticking by the settled drilled cuttings is easy to be encountered. A polyether fatty acid gelling agent LQZ has been developed to deal with this problem. The molecular structure, thermal stability, gelling property and emulsion stability of ...
The Synthesis and Application of an Environmentally Friendly High Temperature Graft Oligosaccharide Filter Loss Reducer
ZHENG Bin
2023, 40(3): 313-318. doi: 10.12358/j.issn.1001-5620.2023.03.005
Abstract(811) HTML (275) PDF (2640KB)(113) [Cited by] (6)
Abstract:
A graft oligosaccharide filter loss reducer CG-FL was developed through inverse emulsion with starch derivative oligosaccharide as the raw material, acrylamide, 2-acrylamide-2-methapropyl sulfonic acid and N-vinyl pyrrolidone as the graft monomers and AIBN as the initiator. The molecular structure o...
Development and Field Application of a Drilling Fluid Intelligent Testing and Evaluating System
YANG Chao
2023, 40(3): 319-324. doi: 10.12358/j.issn.1001-5620.2023.03.006
Abstract(880) HTML (259) PDF (5450KB)(131) [Cited by] (2)
Abstract:
Real-time testing, cloud store of data, intelligent diagnose and automatic optimization suggestion and the prerequisite for the oil and gas industry to achieve intelligent and digital transformation. To achieve the goal of transformation, a drilling fluid intelligent testing system has been develope...
The Use of a High Performance Water Based Drilling Fluid in Drilling the 5000 m Horizontal Section of a Shale Oil Well in Changqing
HU Zubiao, WANG Qingchen, ZHANG Qin, XU Wen, LI Debo, HAN Chengfu
2023, 40(3): 325-331. doi: 10.12358/j.issn.1001-5620.2023.03.007
Abstract(821) HTML (265) PDF (2166KB)(165) [Cited by] (4)
Abstract:
In 2019, Changqing oilfield has drilled a well with horizontal section of 4,000 m in length, the first long horizontal section well in Asia. In 2021, a well with horizontal section of 5,000 m was drilled in Changqing with water based drilling fluids. The key issues in drilling the ultra-long horizon...
Study on High Temperature Gas-Cut Resistant Weak Gel Drilling Fluid in Shunbei Oil and Gas Field
ZHAO Haiyang, FAN Sheng, LIAN Shixin, LI Shuanggui, CHEN Xiuping, KE Dian
2023, 40(3): 332-339. doi: 10.12358/j.issn.1001-5620.2023.03.008
Abstract(813) HTML (281) PDF (2845KB)(109) [Cited by] (6)
Abstract:
The carbonate Yijianfang formation and the Yingshan formation of the Ordovician system in the Shunbei oil and gas field is developed with microfractures and active gas zones. Serious and frequent CH4 and CO2 gas cut ascended fast in the annular spaces, leading to coexistence of mud losses and well b...
Mechanisms Casing Contamination by Drilling Fluids in Ultra-Deep Well Drilling
SONG Hanxuan, ZHENG Lianjie, ZHANG Shiling, GUO Jixiang, ZHANG Xiaojun, GAO Chenhao, LIU Hongyu
2023, 40(3): 340-348. doi: 10.12358/j.issn.1001-5620.2023.03.009
Abstract(801) HTML (276) PDF (6900KB)(88)
Abstract:
By analyzing the residual rate of drilling fluids on the surfaces of casing strings in ultra-deep wells, it was ascertained that temperature is the main factor affecting the residue of drilling fluids on the surfaces of the drilling strings. In high temperature ultra-deep wells, oil-based drilling f...
Drilling Fluid Technology for Drilling the Slim Hole Horizontal Shale Oil Well Shuaye-3-7HF
JIN Junbin, GAO Shuyang, CHEN Xiaofei
2023, 40(3): 349-355. doi: 10.12358/j.issn.1001-5620.2023.03.010
Abstract(879) HTML (358) PDF (2717KB)(119) [Cited by] (3)
Abstract:
The well Shuaiye-3-7HF is a Φ118 mm slim hole sidetracked horizontal shale oil well drilled in the Qintong block in northern Jiangsu area. Several problems were encountered during drilling, such as instability of shale formations, high pressure losses in the annular spaces, mud losses, higher requir...
Borehole Wall Stabilization Technology for Drilling the Long Horizontal Section Coal Rock Gas Well JN1H
WANG Zaiming, CHEN Jinxia, SHEN Yuanyuan, ZHU Kuanliang, LI Zhanwei, HOU Yi, DENG Wei
2023, 40(3): 356-362. doi: 10.12358/j.issn.1001-5620.2023.03.011
Abstract(708) HTML (227) PDF (3054KB)(101) [Cited by] (12)
Abstract:
Wells with long horizontal sections were drilled in the eastern margin of Ordos basin and penetrated the 8# coalbed of the Benxi formation. Borehole stability problems during drilling and completion of the wells made it difficult to drill these extended reach wells. Studies were conducted on the bor...
Mud Loss Control Technology in Qiongdongnan Basin under High Temperature and High Pressure Bearing Conditions
LIN Siyuan, LU Yunhu, ZHANG Liquan
2023, 40(3): 363-367. doi: 10.12358/j.issn.1001-5620.2023.03.012
Abstract(707) HTML (220) PDF (3653KB)(98) [Cited by] (7)
Abstract:
The well XX23-1-1 is a key exploratory well drilled in the Qiongdongnan basin (a basin located in the southeast of Hainan Province). Mud losses were encountered when drilling to 4,186.22 m. A new HTHP pressure bearing lost circulation control technique was presented to deal with the mud losses based...
Study on Special Dissolving Agent of Marine Epoxy Resin Plugging Agent in Western Sichuan
LAN Lin
2023, 40(3): 410-414. doi: 10.12358/j.issn.1001-5620.2023.03.019
Abstract(676) HTML (223) PDF (2905KB)(72) [Cited by] (1)
Abstract:
The marine facies of the Chuanxi gas field has characteristics of ultra-deep high temperature, salt gypsum layer, and high sulfur content. The development of the triple well system with ultra-deep and high inclination results in frequent malignant and recurrent losses. Epoxy resin plugging agent has...
CEMENTING FLUID
Control Measures of Cement High-temperature Deterioration Performance under Dry-hot Rock Conditions
DANG Donghong, LIU Ningze, WANG Dan, MEI Kaiyuan, CHENG Xiaowei, SUN Xingjia
2023, 40(3): 368-375. doi: 10.12358/j.issn.1001-5620.2023.03.013
Abstract(705) HTML (239) PDF (3240KB)(60) [Cited by] (1)
Abstract:
When cementing geothermal wells in dry hot rocks, the bottom temperature is often as high as above 200 ℃. Aiming at the problem of strength decline of cement paste caused by high temperature at the bottom of the well under dry-hot rock conditions, this paper directly starts from the chemical composi...
Study on a Foam Lightweight Cement Slurry and the Distribution of Its Micro Pores
REN Qiang, LIU Ningze, LUO Wenli, GAO Fei, LIU Jingli, LIU Yan, YANG Yuhang, CHENG Xiaowei
2023, 40(3): 376-383. doi: 10.12358/j.issn.1001-5620.2023.03.014
Abstract(677) HTML (237) PDF (3702KB)(52) [Cited by] (1)
Abstract:
Foam lightweight cement slurry is very important to the safety of downhole operation in low-pressure easy-to-leak formation drilling. A high temperature high efficiency foaming agent FPJ-S has been developed to formulate lightweight cement slurries. FPJ-S is prepared from the hydrophilic tetradecane...
Simulation Study of Sealing Integrity in Abandoned Wells Within CO2 Sequestration Block
WANG Dian, LI Jun, LIU Penglin, LIU Xianbo, LIAN Wei, LU Zongyu
2023, 40(3): 384-390. doi: 10.12358/j.issn.1001-5620.2023.03.015
Abstract(673) HTML (222) PDF (4762KB)(58) [Cited by] (1)
Abstract:
As the main leakage pathway in CO2 sequestration, the sealing integrity of the abandoned wellbore is directly related to the sequestration effect. To this end, for the abandoned wellbore leakage problem, a three-dimensional finite element model of cement plug-formation is developed based on the cohe...
Liner Cementing through Precise Pressure Control in the Ultra-Deep Well Tian-X Located at the Southern Margin of the Junggar Basin
FEI Zhongming, LIU Xin, ZHANG Ye, ZHANG Xiaojian, JIANG Shiwei, SHEN Lei, YANG Zufu
2023, 40(3): 391-396. doi: 10.12358/j.issn.1001-5620.2023.03.016
Abstract(702) HTML (217) PDF (3074KB)(70) [Cited by] (4)
Abstract:
The well Tian-X is an exploratory well located at the Anjihai anticline (an anticline in the Huomatu anticline zone) in the south edge thrust belt in the Junggar Basin. The 6th interval (Ф139.7 mm) penetrates a long open hole section of the well with coexistence of high and low pressure zones and na...
Research and Application of Organic and Inorganic Hybrid Thixotropic Agents
SHI Ye, MU Jianlei, ZHU Feng, LI Xiumei, YANG Hewei, CHANG Qinglu, MA Chunhui, GUO Jintang
2023, 40(3): 397-402. doi: 10.12358/j.issn.1001-5620.2023.03.017
Abstract(675) HTML (215) PDF (2339KB)(70) [Cited by] (1)
Abstract:
A thixotropic cement slurry can be obtained by adding thixotropic agent into a common cement slurry, and this thixotropic cement slurry can be used to deal with severe mud losses and difficulties in cementing a well penetrating weak formations. Thixotropic cement slurries presently in use have sever...
FRACTURING FLUID & ACIDIZING FLUID
Study on Oil Displacement Performance of Rhamnolipid Compound Imbibition Agent in Fracturing Fluid
JIA Fei, CHEN Xianjiang, JI Yongjun, FAN Qinghu, MENg Xianhang, MA Yue, BAI Yelei, CHEN Shengan
2023, 40(3): 403-409. doi: 10.12358/j.issn.1001-5620.2023.03.018
Abstract(682) HTML (221) PDF (2625KB)(58) [Cited by] (1)
Abstract:
In view of the problem that low permeability reservoirs are mainly transformed by volumetric fracturing, which cannot continuously improve production and increase the validity period of well development, the low-damage fracturing fluid with aspiration function was studied, and firstly, the combinati...

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