2021 Vol. 38, No. 2

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2021, 38(2)
Abstract(287) PDF (1066KB)(30)
Abstract:
FORUM
Research Progress of Controllable Polymer Gel Lost Circulation Materials
LI Wenbo, LI Gongrang
2021, 38(2): 133-141. doi: 10.3969/j.issn.1001-5620.2021.02.001
Abstract(805) PDF (945KB)(98) [Cited by] (21)
Abstract:
Polymer gel lost circulation materials (LCM) have the advantages of high viscoelasticity and deformability. However, the gelation of polymer gel LCM is uncontrollable, severely restricting their use in controlling mud losses. This paper summarizes the research progress made in the development of con...
DRILLING FLUID
Study and Application of a Double Esterified Modified Starch Filter Loss Reducer
ZHANG Kun, MA Hong, SHU Ruhong, LIU Qiang, WANG Wei, SUN Shuang, XIONG Lasheng
2021, 38(2): 142-145. doi: 10.3969/j.issn.1001-5620.2021.02.002
Abstract(862) PDF (2728KB)(57) [Cited by] (5)
Abstract:
Conventional modified starch as a filter loss reducer, has the shortcomings of high viscosity effect and poor temperature stability. A double-esterified starch filter loss reducer BZ-JLS was developed to overcome these shortcomings. BZ-JLS was synthesized with acetic anhydride, sodium trimetaphospha...
Development of A Polymer Filter Loss Reducer for Ultra-High Temperature Water Base Drilling Fluids
GAO Wei, LI Yinting, YU Fuchun, LI Shuanggui, MAO Hui
2021, 38(2): 146-151,157. doi: 10.3969/j.issn.1001-5620.2021.02.003
Abstract(730) PDF (2257KB)(68) [Cited by] (15)
Abstract:
A new polymer filter loss reducer CLG-240 was developed for use in water base drilling fluids in ultra-high temperature operations. CLG-240 was synthesized with acrylamide, 2-acrylamide-2-methyl propane sulfonic acid and dimethylaminoethyl methacrylate as the monomers, and 2,2'-azobis[2-methylpropio...
The Development and Properties of an Environmentally Friendly Metal Friction Reducer for Coiled Tubing
ZOU Peng, WANG Wenshan, YANG Yanchang, LIU Lin, LIU Chunlong, LIU Song, XIE Tongchuan
2021, 38(2): 152-157. doi: 10.3969/j.issn.1001-5620.2021.02.004
Abstract(751) PDF (1448KB)(43)
Abstract:
An environmentally friendly oil in water (O/W) metal friction reducer has been developed to address the locking problem encountered in coiled tubing operation in a horizontal well with long horizontal sections. The metal friction reducer was made from several core reactants such as a modified vegeta...
Laboratory Study and Application of a Multifunctional Lubricant for Silicate Drilling Fluids
LIU Zhiqin, GUAN Shen, XU Mingbiao, WU Jiao
2021, 38(2): 158-163. doi: 10.3969/j.issn.1001-5620.2021.02.005
Abstract(520) PDF (1496KB)(51) [Cited by] (8)
Abstract:
The special formation characteristics of the Beibuwan Basin always leads to borehole wall collapse during drilling operation. Silicate mud, which has the advantage of stabilizing the sloughing formation was introduced to deal with borehole wall instability. The silicate mud has its own problems:poor...
Research on Dihexadecyldimethyl Ammonium Chloride As A Poor Solid flocculant for Oil-based Drilling Fluid
JING Minjia, LI Wuquan, JIANG Guancheng
2021, 38(2): 164-169. doi: 10.3969/j.issn.1001-5620.2021.02.006
Abstract(793) PDF (3896KB)(49) [Cited by] (11)
Abstract:
Drilled cuttings of low quality have great influence on the properties of oil base drilling fluids and are difficult to remove because of their small particle sizes. Flocculants can be used to enlarge the particle sizes of the drilled cuttings through flocculation but are generally used in water bas...
Laboratory Study on Optimization of Drilling Fluid Used in Southwest Tarim Basin with Nanoemulsion
SHENG Yong, YE Yan, ZHU Jinzhi, SONG Hanxuan, ZHANG Zhen, ZHOU Guangxu, WANG Tao
2021, 38(2): 170-175. doi: 10.3969/j.issn.1001-5620.2021.02.007
Abstract(714) PDF (2063KB)(48) [Cited by] (7)
Abstract:
The southwest Tarim Basin has plenty of oil and gas resources, rendering this area excellent exploration and development potential. However, the complex geological condition in this area seriously restricts the exploration and development potential. Mud losses, pipe sticking, reaming, borehole wall ...
A Strongly Inhibitive Anti-Sloughing Water Base Drilling Fluid for Shale Reservoir Drilling
WANG Peiping
2021, 38(2): 176-182. doi: 10.3969/j.issn.1001-5620.2021.02.008
Abstract(700) PDF (1353KB)(58) [Cited by] (11)
Abstract:
Drilling the long horizontal section of the shale gas well W-X1 in Weiyuan area has encountered downhole problems such as borehole wall instability, mud losses and high friction between the drilling string and the borehole wall. A water base drilling fluid with strong inhibitive capacity and anti-sl...
Water Base Drilling Fluid Technology for Ultra-Long Horizontal Drilling in a Tight Gas Well in Changqing Oilfield
HU Zubiao, ZHANG Jianqing, WANG Qingchen, MENG Fanjin, HOU Bo, ZHANG Qin, QU Yanping
2021, 38(2): 183-188. doi: 10.3969/j.issn.1001-5620.2021.02.009
Abstract(695) PDF (1187KB)(61) [Cited by] (9)
Abstract:
Changqing Oilfield has in the year 2020 drilled three wells with ultra-long horizontal sections in its tight gas well block, the lengths of the horizontal sections are 3321 m, 4118 m and 4466 m, respectively. These long horizontal sections were all drilled with water base muds, and each of the horiz...
Preparation and Application of a Temperature-Controlled Expanding LCM Made from Shape-Memory Polymer
YANG Qianyun, WANG Baotian, YANG Hua, LIU Xueming
2021, 38(2): 189-195. doi: 10.3969/j.issn.1001-5620.2021.02.010
Abstract(628) PDF (2333KB)(36) [Cited by] (9)
Abstract:
An expandable polymer lost circulation material (LCM), SDP, was developed to deal with mud losses into fractured formations. SDP was made from oligomer resin monomer which reacts at high temperatures with a crosslinker and a toughener under the action of a catalyst. SDP is pressure bearable and its ...
Gel Plugging System for Oil-Based Drilling Fluid and Its Application
JI Weijun, YANG Yong, YAN Yongsheng, TANG Guowang
2021, 38(2): 196-200. doi: 10.3969/j.issn.1001-5620.2021.02.011
Abstract(597) PDF (12761KB)(50) [Cited by] (7)
Abstract:
Based on the research and analysis of modern shale gas drilling, and comprehensively comparing the shortage of oilbased drilling fluid plugging technology at home and abroad, a gel plugging system for oil-based drilling fluid is studied. The related components of the gel system were studied by IR, X...
Crack Width Prediction Model Based On Optimized BP Neural Network
HE Tao, XIE Xiantao, WANG Jun, ZHAO Yang, SU Junlin
2021, 38(2): 201-206. doi: 10.3969/j.issn.1001-5620.2021.02.012
Abstract(648) PDF (2448KB)(47) [Cited by] (20)
Abstract:
The problem of fractured well loss is a serious threat to the safety and progress of drilling production. At present, the success rate of field plugging is relatively low one of the important reasons is that the fracture width cannot be accurately predicted, and the limitations of fracture width cog...
Research on Plugging Technology of Shale Gas Oil-Based Crosslinking Solidification
LIU Wei, MAO Lijun, OUYANG Wei
2021, 38(2): 207-211. doi: 10.3969/j.issn.1001-5620.2021.02.013
Abstract(554) PDF (1164KB)(49) [Cited by] (14)
Abstract:
Shale gas stream the dragon group, mainly using oil-base drilling fluid microfracture stratum itself development, drilling fluid density is high, easy to generate induced cracks, oil-base drilling fluid leakage occurs, produce the huge economic losses, at home and abroad research on mechanism of oil...
Development of a Device for Evaluating Lost Circulation Materials at High Temperature High Pressure
YAN Junfeng, WU Jinsheng, JIANG Bing, WANG Yongming, LIU Jianjun
2021, 38(2): 212-217. doi: 10.3969/j.issn.1001-5620.2021.02.014
Abstract(552) PDF (3003KB)(42) [Cited by] (7)
Abstract:
A device (Model DL-3A) used for evaluating the performance of lost circulation materials at high temperature and high pressure was developed to simulate the deep sea HTHP working environment in which mud losses occur and are being stopped. Relevant literatures at home and abroad were consulted when ...
Design and Performance of a Slow-Release Self-Gel-Breaking Completion Fluid for Multilateral Wells
LI Chao, HUANG Yue, LIU Gang, LUO Jiansheng, XU Mingbiao, YOU Fuchang
2021, 38(2): 218-225. doi: 10.3969/j.issn.1001-5620.2021.02.015
Abstract(739) PDF (3592KB)(41) [Cited by] (5)
Abstract:
Slow-release self-gel-breaking completion fluid for multilateral wells is a new kind of wellbore working fluid. With its special self-gel-breaking capacity in reservoir, this completion fluid helps avoid conventional acid jobs and gel-breaking operation in well completion, and is thus an important t...
Study On Intelligent Gel Breaking Completion Fluid System In Offshore Oil-Gas Field
WEI Yusen, XIONG Youming, ZHOU Shusheng
2021, 38(2): 226-230. doi: 10.3969/j.issn.1001-5620.2021.02.016
Abstract(544) PDF (1296KB)(32) [Cited by] (8)
Abstract:
For the development of heavy oil reservoirs in offshore oil and gas fields, the fish bone spur branch well technology was adopted, and the completion fluid in the branch well filling process cannot be gel-broken, so that gravel pack operation cannot be effectively implemented in the branch well. The...
CEMENTING FLUID
Corrosion Inhibitive Cement Slurry and Supporting Techniques for Cementing the Luohe Aquifer in Changqing Oilfield
MIN Jiangben, LIU Xiaoli, WAN Xiangchen
2021, 38(2): 231-236. doi: 10.3969/j.issn.1001-5620.2021.02.017
Abstract(508) PDF (1014KB)(33) [Cited by] (3)
Abstract:
Corrosion of the cement sheath sealing off the Luohe aquifer has caused the permeability of the cement sheath to increase, resulting in severe corrosion of the casing string in the aquifer section. Corrosion boring in the casing string has resulted in problems such as increase in the water cut of th...
Study and Application of Evaluating the Performance of Cement Slurries Under Dynamic Complex Pressures
LI Zhiheng, ZHANG Xiaocheng, XIE Tao, LI Jin, ZHANG Yuchen
2021, 38(2): 237-242. doi: 10.3969/j.issn.1001-5620.2021.02.018
Abstract(601) PDF (3242KB)(30) [Cited by] (3)
Abstract:
A comprehensive method for evaluating the anti-channeling performance of cement slurries under dynamic complex pressures was developed for the purpose of improving the job quality of cementing adjustment wells under dynamic complex pressures and satisfying the requirements of performing well cementi...
Damage Evaluation of Perforated Cement Sheath and Study on Fracture Propagation Law
ZHANG Xiaocheng, LI Jin, HAN Yaotu, ZHANG Qilong, LIU Peng
2021, 38(2): 243-248. doi: 10.3969/j.issn.1001-5620.2021.02.019
Abstract(626) PDF (1772KB)(38) [Cited by] (5)
Abstract:
In order to further improve the mechanical integrity of cement sheath in the process of perforation, fracturing and filling completion or hydraulic fracturing, and meet the requirements of completion and stimulation operation for cement sheath integrity. Aiming at the damage of cement sheath under p...
Study and Application of a High-Performance Salt-Resistant Cement Slurry
DAN Meihan
2021, 38(2): 249-254. doi: 10.3969/j.issn.1001-5620.2021.02.020
Abstract(673) PDF (1138KB)(38) [Cited by] (7)
Abstract:
High-pressure salt and gypsum beds prevail in the Missan Oilfield in Iraq. In well cementing, tight hole resulting from the creeping of salt layers, increasing salinity of cement slurries from hole washout and salt dissolution, narrow drilling window and reduced displacing efficiency pose challenges...
A New Weakly Acidic Drag Reducing Viscosity Reducer
AN Shaohui, LU Haichuan, TIAN Dongcheng, FENG Wangsheng, GAO Jichao, LIU Yanjun, YAN Yubo
2021, 38(2): 255-258. doi: 10.3969/j.issn.1001-5620.2021.02.021
Abstract(475) PDF (928KB)(32)
Abstract:
Synthetic polymers, because of their high temperature resistance, high salt-resistance and versatility, have long been the leading material of cement additives. Cement slurries treated with high molecular weight polymers generally have high consistency and their rheology is difficult to adjust. Conv...
FRACTURING FLUID & ACIDIZING FLUID
Study on Neutral Integrated Slick Water System for Acidification and Fracturing
YAO Erdong, WU Guodong, ZHAO Longhao, MELJEM Guli Anweier, LIU Yanchi, ZHOU Fujian
2021, 38(2): 259-264. doi: 10.3969/j.issn.1001-5620.2021.02.022
Abstract(657) PDF (1562KB)(32) [Cited by] (2)
Abstract:
After conventional fracturing operations, acidification is usually used to relieve the damage of the reservoir. There are many operating steps and poor economic performances. The development of a liquid system that can realize both fracturing and acidification has practical significance. In this pap...

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