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Strengthening shale wellbore with silica nanoparticles drilling fluid

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Petroleum 2016年第2期2卷 189-195页

作者： Yili Kang Jiping She Hao Zhang Lijun You Minggu Song State Key Lab of Oil and Gas Reservoir Geology and Exploitation in Southwest Petroleum University Chengdu 610500China College of Energy Resources in Chengdu University of Technology Chengdu 610059China

Nanoparticles have been widely used to reduce wellbore instability problems of shale *** this paper,nanoparticle-containing water-based drilling fluids(WBDFs)and oil-based drilling fluids(OBDFs)were evaluated by running three new tests including spontaneous imbibition,swelling rate and acoustic transit *** showed that,for the WBDFs,nanoparticles leaded to higher plastic viscosity(PV)and yield point(YP),and lower ***,because pore throats of shale can be plugged by nanoparticles,imbibition amount,swelling rate,and Young's-modulus reduction of shale decreased *** concentration of nanoparticles can induce better plugging ***,for the OBDFs,nanoparticles did not show these positive effects like the nano WBDFs,even leaded to some negative effects such as higher filtration and larger Young'smodulus *** main reasons are that the silica nanoparticles can easily disperse in the WBDFs,and effectively prevent the filtrate invading into shale by plugging pore *** the same silica nanoparticles are difficult to disperse in OBDFs,and do not perform the expected *** study indicates that nano WBDFs have great potential to reduce the wellbore instability problems of shale formation.

关键词： Shale Wellbore instability Nanoparticles Strengthen wellbore drilling fluid

Research and Application of Fuling Shale Gas Anti-Collapse and Anti-Leakage drilling fluid System

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Open Journal of Yangtze Oil and Gas 2021年第2期6卷 60-71页

作者： Baijing Wang Chunzhi Luo Yidi Wang College of Chemistry and Environmental Engineering Yangtze University Jingzhou China

Aiming at the problems of microfracture development in hard brittle shale gas layer in Fuling block, Chongqing, such as collapse of borehole wall and the existence of permeability loss of microfracture during drilling, and serious pollution of drilling environment with oil-based drilling fluid, a water-based drilling fluid system for anti-collapse and anti-leakage was studied. A water-based drilling fluid system with anti-collapse and anti-leakage was formed by introducing functional treatment agents, such as polypolysaccharide MEG, polymer emulsion film forming wall cementing agent LFGB, polyamine inhibitor LCFA and deformable particle plugging agent BXLZ, into the conventional water-based drilling fluid. After rolling at 130°C for 16 h, the system has good rheological properties, low filtration loss, good inhibition, lubrication and plugging properties. It has good plugging properties for 0.12 mm, 0.24 mm, 0.38 mm micro-cracks and 400 mD and 800 mD sand plates. The system was successfully tested on site in August 2019 in Fuling Reef Block, showing good rheological properties, solid wall plugging, and strong ability to seal and inhibit fracture expansion. There was no block falling in the drilling process, and the tripping, casing running and well cementing operations were all smooth, which provided a new technical idea and scheme for environmental protection and green drilling in Fuling shale gas exploitation.

关键词： Shale drilling fluid Inhibition fluid Loss Lubricity Plugging

Improvements of drilling fluid processing for cable-suspended electromechanical drills

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Global Geology 2013年第2期16卷 99-105页

作者： YU Dahui Pavel Talalay XU Huiwen CAO Pinlu Mikhail Sysoev HAN Lili HAN Junjie Polar Research Center Jilin University College of Construction Engineering Jilin University

Deep ice drilling in Polar Regions plays a key role in paleo-climate, microbiological and glaciological researches. For deep ice and subglacial coring the special purpose-built electromechanical cable-suspended drills with bottom-hole circulation are designed and explored. Used at present drilling fluid circulation systems are specified by very high fluid wastes during processing. Measurements in deep drilling projects in Antarctic and Greenland ice sheets showed that 25%-40% of the drilling fluid, pumped into the hole, is retrieved to the surface with cable and drill, and up to 45% of retrieved fluid goes to waste. This leads not only to increasing of the fluid consumption and cost of the project in general but also to severe contamination of air, surface and near-surface snow-firn layers at the drilling site. In order to reduce wastes and environmental impact, it is proposed to modify drilling fluid processing system by avoiding of evaporation and leakages of fluid as far as practicable. drilling fluid is prepared and pumped into the hole according to predetermined program on semiautomatic mode, and volume and density of blended and pumped into the hole drilling fluid are measured continuously. Components of the drilling fluid are stored and mixed in the special closed containers equipped by pressure relief valves. Separation of drilling fluid from ice cuttings is carried out by two steps: firstly, fluid is separated with hydro extractor and then with thermal separator. To reduce the amount of removed drilling fluid with cable special squeezing collar is installed on the borehole mouth. All these arrangements are able to decrease drilling fluid wastes in many times.

关键词： polar drilling drilling fluid cable-suspended electromechanical drill

Laboratory Study on 210°C High Temperature and Salt Resistant drilling fluid

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Open Journal of Yangtze Oil and Gas 2021年第3期6卷 83-97页

作者： Xintong Li Qichao Cao Li He Shunyuan Zhang Song Wang Yangtze University Jingzhou China China Petroleum Engineering Technology Research Institute Co. Ltd. Overseas Office Beijing China

Combined with the current research status in this area at home and abroad, with the improvement of salt and high temperature resistance as the research goal, the laboratory research of salt and high temperature resistant drilling fluid system has been carried out, and lubricants, inhibitors and stabilizers have been optimized. The final drilling fluid formula is: water + 3% sepiolite + 0.3% Na2CO3 + 3% RH-225 + 3% KCOOH + 3% G-SPH + 3% CQA-10 + 1.5% ZX-1 + Xinjiang barite, density 2.2 g/cm3, using hot-rolling furnace, environmental scanning electron microscope, high temperature and high pressure plugging instrument and Zeiss microscopes and other instruments use core immersion experiments, permeability recovery value experiments, and static stratification index methods to perform temperature resistance, reservoir protection, plugging performance, and static settlement stability performance of the configured drilling fluid., Inhibition performance, biological toxicity, salt resistance, anti-pollution performance have been tested, and it is concluded that the temperature resistance is good under the condition of 210°C, and the salt resistance can meet the requirements of 20% NaCl + 0.5% CaCl2 concentration. It has a good reservoir protection effect, the permeability recovery value can reach more than 90%, the performance of restraining water dispersion and cuttings expansion is good, the heat roll recovery rate can reach more than 85%, and the SSSI value shows that its settlement stability performance is good;Its plugging performance is good under high temperature and high pressure. It laid the foundation for the next step to promote the field application of the drilling fluid system.

关键词： Salt Resistance High Temperature Resistance drilling fluid Performance Evaluation

Study and application of Toxicity Test Method Using Neomysis awatschensis in Toxicity Evaluation of drilling fluid

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Marine Science Bulletin 2002年第1期4卷 71-75页

作者：颜天周名江谭志军于仁诚李钧王云峰 Institute of Oceanology Chinese Academy of Sciences Qingdao 266071

Neomysis awatschensis was collected on the west coast of Jiaozhou Bay, Qingdao in 1992 and acclimated in the laboratory conditions. The acute toxicity method using 4~ 6 day juvenile mysid of this species is studied. The species is compared with M. bahia in taxonomy, geographic distribution, morphology, as well as the sensitivity to reference toxins. Based on the results, we recommend N. awatschensis to be a standard marine organism for toxicity test in China and the method to be applied in toxicity evaluation of drilling fluids. In this paper, we report the results of the above studies and the application of the method in the evaluation of several drilling fluid products.

关键词： Neomysis awatschensis toxicity evaluation standard organism drilling fluid

A Multifunctional drilling fluid for Coalbed Methane drilling

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A Multifunctional Drilling Fluid for Coalbed Methane Drillin...

Fuzzy Ball drilling fluid for CBM in the Ordos Basin of China

2011 SSITE International Conference on Future Material Research and Industry Application(FMRIA 2011)

作者： Zheng Lihui Zhang Mingwei Lin Yong Professor Key Laboratory for Petroleum Engineering of the Ministry of Education China University of Petroleum Beijing Master of Petroleum Engineering China University of Petroleum Beijing drilling Engineering Research Institute of oil and Gas Technology Changqing Oil Field BranchPCL

With extremely complicated geological conditions, there is abundant coalbed methane in the China’s Ordos Basin AreaAs a result of coexistence of different pressure systems in the same one naked well section, there are so many problems taking place occasionally during the drilling process, such as the formation lost circulation and collapse, which require the drilling fluid with a perfect rheology behavior and inhibitive to improve the well-bore containmentThe coalbed methane well completions are diverse, usually including vertical well, horizontal well, multi-branch well, and other different well typesSo the drilling fluid must have cuttings carried effectively and protect formation damaged to ensure that the process of drilling is security and smoothLots of drilling methods are used in the coalbed methane drilling, besides normal nearly balanced drilling, the under balance drilling fluids such as the air, fog, foam, etc particularly improvedAll this drilling fluids require itself working compatibility with other fluids in the holeTherefore, the special state-funded science and technology project has developed a novel bionic Fuzzy-Ball drilling fluid to meet the coalbed methaneWithout additional equipments, this novel drilling fluids can be made, with non-solid phase and low density, 0.8.0 g/cm3The inert solids can also be used to adjust the property to more than 1.0g/cm3, matching the near/under-balanced drillingThe formation well-bore containment can effectively improve to meet to the more than 1000 meters coalbed methane drilling in the open or low pressure formation, To portable cuttings effectively under low rate, the ratio of yield point and plastic viscosity can be adjusted to 1.0Pa/m Pa·s or moreCombined with the air drilling, this novel Fuzzy-Ball material could not be converted to fluid to solve the formation water production, cavings, completion and other operations10 wells application of using the Fuzzy-Ball drilling fluid to complete the coal bed methan

关键词： Multifunction Coalbed methane Bionics Fuzzy-Ball drilling fluid

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Fuzzy Ball Drilling Fluid for CBM in the Ordos Basin of Chin...

A novel responsive stabilizing Janus nanosilica as a nanoplugging agent in water-based drilling fluids for exploiting hostile shale environments

2012 International Conference on Engineering Materials (ICEM 2012)

作者： Jinfeng Wang Jingen Deng China University of Petroleum-Beijing

Fuzzy ball drilling fluids have been developed in order to effectively control lost circulation during CBM drilling. Depending upon fuzzy balls and colloids in fuzzy balls, the fuzzy ball drilling fluids changed their shapes and properties to completely plug underground heterogeneous seepage channels so as to strengthen the pressure bearing capacity of formations. This paper describes the available features of the fuzzy ball drilling fluid including efficient plugging, good carrying and suspension, formation damage control, compatible weighted by any weighted materials without auxiliary equipment. The fuzzy ball drilling fluids can finish drilling in low pressure natural gas zone, control CBM leakage;control the natural fractures, drilling in different pressures in the same open hole, combination with the air drilling mode, etc. during Ordos CBM drilling. The fuzzy ball drilling fluid will not affect down-hole motors and MWD. The fuzzy ball drilling fluid will be blend simply as conventional water based drilling fluids. The existing CBM drilling equipment can completely meet the fuzzy ball drilling mixing and it is maintained conveniently. The fuzzy ball drilling fluid is the efficient drilling fluid.

关键词： Fuzzy ball drilling fluid drilling Coalbed methane

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Petroleum Science 2024年第2期21卷 1190-1210页

作者： Alain Pierre Tchameni Lv-Yan Zhuo Lesly Dasilva Wandji Djouonkep Robert Dery Nagre Lu-Xin Chen Lin Zhao Chao Ma Bin-Qiang Xie College of Petroleum Engineering Yangtze UniversityWuhan430100HubeiChina Key Laboratory of drilling and Production Engineering for Oil and Gas HubeiChina Lost Circulation Control Laboratory National Engineering Laboratory for Petroleum Drilling EngineeringYangtze UniversityWuhan430100HubeiChina College of Petroleum Engineering Shandong Institute of Petroleum and Chemical TechnologyDongying257061ShandongChina Petroleum Engineer Research Institute of Petrochina Dagang Oilfield Tianjin300280China Department of Chemical Engineering Kumasi Technical UniversityP.O.Box 854KumasiGhana

Thermo-responsive nanocomposites have recently emerged as potential nanoplugging agents for shale stabilization in high-temperature water-based drilling fluids(WBDFs). However, their inhibitory properties have not been very effective in high-temperature drilling operations. Thermo-responsive Janus nanocomposites are expected to strongly interact with clay particles from the inward hemisphere of nanomaterials, which drive the establishment of a tighter hydrophobic membrane over the shale surface at the outward hemisphere under geothermal conditions for shale stabilization. This work combines the synergistic benefits of thermo-responsive and zwitterionic nanomaterials to synchronously enhance the chemical inhibitions and plugging performances in shale under harsh conditions. A novel thermoresponsive Janus nanosilica(TRJS) exhibiting zwitterionic character was synthesized, characterized,and assessed as shale stabilizer for WBDFs at high temperatures. Compared to pristine nanosilica(Si NP)and symmetrical thermo-responsive nanosilica(TRS), TRJS exhibited anti-polyelectrolyte behaviour, in which electrolyte ions screened the electrostatic attraction between the charged particles, potentially stabilizing nanomaterial in hostile shaly environments(i.e., up to saturated brine or API brine). Macroscopically, TRJS exhibited higher chemical inhibition than Si NP and TRS in brine, prompting a better capability to control pressure penetration. TRJS adsorbed onto the clay surface via chemisorption and hydrogen bonding, and the interactions became substantial in brine, according to the results of electrophoretic mobility, surface wettability, and X-ray diffraction. Thus, contributing to the firm trapping of TRJS into the nanopore structure of the shale, triggering the formation of a tight hydrophobic membrane over the shale surface from the outward hemisphere. The addition of TRJS into WBDF had no deleterious effect on fluid properties after hot-treatment at 190℃, implying that TRJ

关键词： Janus nanosilica Thermo-responsive copolymer Anti-polyelectrolyte effect Shale stabilizer Inhibition Plugging drilling fluid

Application status and prospect of ionic liquids in oilfield chemistry

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Petroleum 2024年第1期10卷 11-18页

作者： Jinsheng Sun Zhuoyang Xiu Li Li Kaihe Lv Xianfa Zhang Zonglun Wang Zhiwen Dai Zhe Xu Ning Huang Jingping Liu School of Petroleum Engineering China University of Petroleum (East China) CNPC Engineering Technology R&D Company Limited Oil & Gas Technology Research Institute of Changqing Oilfield Company

The ionic liquid, as a new treatment agent, has been increasingly applied in oil fields due to its strong temperature resistance, good solubility and high surface activity. In this paper, we systematically discuss the action mechanism and application effect of ionic liquids in oilfield chemistry. Ionic liquids can inhibit shale hydration expansion and reduce fluid loss through adsorption and intercalation, inhibit the formation of natural gas hydrate through imidazole five-membered ring structure as a space barrier, reduce viscosity of heavy oil by breaking chemical bonds of heavy oil macromolecules and charge transfer,improve oil displacement efficiency by forming ions pairs with carboxyl groups in crude oil, demulsify by forming channels between dispersed water droplets, acidify the formation by reacting with water to produce acid, interacts with organic material through weak hydrogen bonds and extracts it from oilfield wastewater, desulphurize by inserting sulfide molecules into the “stack” structure and form liquid inclusion complex, inhibit corrosion by forming a protective film on the metal surface. Based on the above aspects, the development direction of ionic liquids is proposed. The application of ionic liquids in oilfield chemistry is still in its infancy. It is urgent to fully explore the application performance of ionic liquids in oilfield chemistry, which also provides theoretical and technical supports for efficient reservoir development.

关键词： Ionic liquids Oilfield chemistry Shale inhibitor drilling fluid