李兵, 赖哲涵, 吴建军,等.鄂尔多斯盆地海陆过渡相页岩储层流体敏感性实验研究[J].河南理工大学学报（自然科学版）,2026,45(5):166-176.

LI B, LAI Z H, WU J J,et al.Experimental investigation on fluid sensitivity of marine-continental transitional shale reservoirs in the Ordos Basin[J].Journal of Henan Polytechnic University(Natural Science) ,2026,45(5):166-176.

鄂尔多斯盆地海陆过渡相页岩储层流体敏感性实验研究

李兵1,2, 赖哲涵3, 吴建军1,2, 陈明君3, 白坤森1,2, 康毅力3, 甯冼逸3

1.中石油煤层气有限责任公司工程技术研究院， 陕西 西安  710082；2.中联煤层气国家工程研究中心有限责任公司，北京 100095；3.西南石油大学 油气藏地质及开发工程全国重点实验室， 四川 成都 610500

摘要:海陆过渡相页岩矿物类型多样，黏土矿物含量丰富，储层岩性变化大，孔隙连通性差，使其流体敏感性较为复杂。目的 为系统揭示海陆过渡相页岩储层流体敏感性发育规律及其主控地质因素，开展鄂尔多斯盆地海陆过渡相页岩储层流体敏感性实验研究。方法 以鄂尔多斯盆地东缘山2段海陆过渡相页岩气藏为研究对象，在矿物组成和孔隙结构评价基础上，钻取不同裂缝发育程度的页岩样品，分别采用高回压稳态法和压力衰减法测试页岩样品的速敏、水敏、盐敏、酸敏和碱敏性。  结果 结果表明：（1）研究区海陆过渡相页岩流体敏感性整体为中等偏强-强，高黏土矿物含量是导致流体敏感性损害严重的主要因素；（2）高岭石和伊/蒙间层矿物相对含量较高是导致海陆过渡相页岩与海相页岩流体敏感性差异的主要因素；（3）海陆过渡相页岩储层岩性变化大，加剧了钻完井液和压裂液侵入储层引发的流体敏感损害程度。  结论 基于海陆过渡相页岩储层的特征分析及流体敏感性评价结果，提出针对性的储层保护对策，可为优化钻完井液与压裂液的配方设计、用量控制，以及研发适配的适度压裂工艺提供科学依据。

关键词:海陆过渡相页岩;储层保护;流体敏感性;渗透率;黏土矿物

doi:10.16186/j.cnki.1673-9787.2024030075

基金项目:国家自然科学基金资助项目（42572174）；四川省自然科学基金资助项目（2026NSFSC0339）；中国石油天然气股份有限公司“十四五”前瞻性基础性技术攻关项目（2021DJ2004）

收稿日期:2024/03/27

修回日期:2024/09/24

出版日期:2026-07-24

Experimental investigation on fluid sensitivity of marine-continental transitional shale reservoirs in the Ordos Basin

Li Bing1,2, Lai Zhehan3, Wu Jianjun1,2, Chen Mingjun3, Bai Kunsen1,2, Kang Yili3, Ning Xianyi3

1.Institute of Engineering Technology， Petro China Coalbed Methane Company Limited， Xi’an  710082， Shaanxi， China；2.China United Coalbed Methane National Engineering Research Center Co.， Ltd.， Beijing  100095， China；3.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation， Southwest Petroleum University， Chengdu  610500， Sichuan， China

Abstract:In the process of well construction and hydraulic fracturing in marine-continental transitional shale gas reservoir， fluid sensitivity damage is easily induced by the intrusion of drilling and completion fluids， which restricts gas well production. Marine-continental transitional shale gas reservoirs are characterized by diverse mineral types， high clay mineral content， large lithological variations， and poor pore connectivity， making their fluid sensitivity more complex. To systematically reveal the development patterns of fluid sensitivity in marine-continental transitional shale reservoirs and their dominant geological controls， experimental research on fluid sensitivity was carried out. Methods The marine-continental transitional shale gas reservoir in Member 2 of the Shanxi Formation on the eastern margin of the Ordos Basin was taken as the research object. On the basis of mineral composition and pore structure evaluation， shale samples with different fracture development degrees were drilled. Fluid sensitivity tests of fractures and matrix were designed and carried out by the high back pressure steady-state method and the pressure decay method. Results The results show that： （1）the fluid sensitivity of marine-continental transitional shale in the study area ranges from moderately strong to strong. The high clay mineral content is the main factor leading to severe fluid sensitivity damage； （2） the relatively high content of kaolinite and illite/smectite mixed-layer minerals is the main reason for the difference in fluid sensitivity between marine and marine-continental transitional shales； （3） the lithology of marine-continental transitional shale gas reservoir varies greatly， which aggravates the degree of fluid sensitivity damage caused by the intrusion of drilling and completion fluids and fracturing fluids.  Conclusions Based on the characteristic analysis and fluid sensitivity evaluation results of marine-continental transitional shale gas reservoirs， this paper proposes corresponding formation damage control measures. These can provide a scientific basis for optimizing the formulation and dosage of drilling and completion fluids and fracturing fluids， as well as for developing targeted moderate fracturing technologies.

Key words:marine-continental transitional shale;formation damage control;fluid sensitivity;permeability;clay minerals