深部煤层气地震-地质工程一体化导向技术——以鄂尔多斯东北缘佳县地区为例  

Integrated seismic-geological engineering approach for deep coalbed methane development:A case study of the Jiaxian Block,northeastern margin of the Ordos Basin

作　　者：马立民 丛彭 张明 姚艳斌[2] 李珮杰 魏子琛 张雪琪 么志强 林伟强 MA Limin;CONG Peng;ZHANG Ming;YAO Yanbin;LI Peijie;WEI Zichen;ZHANG Xueqi;YAO Zhiqiang;LIN Weiqiang(PetroChina Jidong Oilfield Company,Tangshan,Hebei 063000,China;School of Energy Resource,China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]中国石油冀东油田分公司,河北唐山063000 [2]中国地质大学(北京)能源学院,北京100083

出　　处：《中国矿业大学学报》2025年第1期138-148,共11页Journal of China University of Mining & Technology

基　　金：国家自然科学基金杰出青年基金项目(42125205);中国石油天然气股份有限公司攻关性应用性科技专项项目(2023ZZ18)。

摘　　要：工厂化大井丛水平井是实现深部煤层气高效开发的关键手段.然而,深部煤储层微构造发育、非均质性强等特点导致井眼三维偏移距大、轨迹控制难度高,极大限制了储层钻遇率.为解决此问题,本研究以鄂尔多斯盆地东北缘佳县地区深8#煤层(埋深为1950~2550 m)为例,考虑储层微构造、非均质性等特征及地震-地质资料条件,提出了一种以地震-地质三维一体化建模与迭代更新、钻井轨迹预判与实时优化调整为核心的地震-地质工程一体化导向技术.该技术主要流程为:开展储层系统高精度三维建模,精细描述储层空间展布,优化井位部署;入靶前实时跟踪随钻测—录—定动态,标志层逐层对比,迭代更新三维模型,优选合适井斜角实现精准着陆;入靶后通过差异化轨迹控制策略、钻头定位、三维产状约束、近钻头方位伽马验判产状,控制水平段精细轨迹.佳县地区先导试验区8口井实钻结果显示,煤层钻遇率提升至98.3%.该技术的成功应用为深部煤层气规模效益开发提供借鉴.Industrialized large-cluster horizontal wells have become a critical approach for the efficient development of deep coalbed methane(CBM)reservoirs.However,the inherent challenges posed by complex microstructures and strong heterogeneity in deep coal reservoirs result in significant three-dimensional wellbore displacement and difficulties in trajectory control,which severely limit the reservoir drilling encounter rates.To address these challenges,this study focuses on the No.8 deep coal reservoir(burial depth of 1950—2550 m)in the Jiaxian Block,located in the northeastern margin of the Ordos Basin.A seismic-geological engineering integrated guidance technology is proposed,leveraging high-precision 3D seismic-geological modeling,trajectory prediction,and real-time optimization during drilling.The proposed workflow includes high-precision 3D modeling of the reservoir system to finely characterize its spatial distribution and optimize well placement strategies;real-time tracking and dynamic updates of measurement—logging—positioning data during drilling,enabling layer-by-layer comparison of marker beds,iterative 3D model refinement,and the selection of optimal wellbore inclination angles to ensure accurate target landing;and post-target-entry fine trajectory control in the horizontal section using differential trajectory strategies,drill bit positioning,three-dimensional attitude constraints,and near-bit gamma-ray orientation logging.The application of this integrated guidance technology in a pilot test of eight wells within the Jiaxian Block resulted in a significant improvement,with the drilling rate of coal seams increasing to 98.3%.These results demonstrate the potential of the seismic-geological engineering integrated guidance technology to address key challenges in the development of deep CBM reservoirs,offering a scalable and efficient solution for industrial applications.

关 键 词：深部煤层气 地震-地质工程一体化 导向钻井 三维建模 

分 类 号：TE38[石油与天然气工程—油气田开发工程]