玛湖砂砾岩储集层可压性评价方法及应用研究  

Study and Application of Fracability Evaluation Method in Sandy Conglomerate Reservoir,Mahu Area

作　　者：纪大刚 冯永存 邓金根[1] 陈希 JI Dagang;FENG Yongcun;DENG Jingen;CHEN Xi(National Key Laboratory of Oil and Gas Resources and Engineering,China University of Petroleum(Beijing),Beijing 102249,China;Key Laboratory of Oil and Gas Safety and Emergency Technology,Ministry of Emergency Management,Beijing 102249,China;Engineering Technology Research Institute,PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang 834000,China)

机构地区：[1]中国石油大学(北京)油气资源与工程全国重点实验室,北京市102200 [2]应急管理部油气生产安全与应急技术重点实验室 [3]中国石油新疆油田公司工程技术研究院

出　　处：《钻采工艺》2025年第2期121-128,共8页Drilling & Production Technology

基　　金：国家科技重大专项资助项目“准噶尔盆地致密油开发示范工程”(编号:2017ZX05070)。

摘　　要：玛湖砂砾岩储集层具有低孔-低渗、非均质性强、砾石含量高等特点,实施高效压裂改造是实现储层效益开采的关键。针对玛湖砂砾岩储集层开展岩石力学实验及测井资料解释,明确储集层力学性质分布差异大且试样呈现弹塑性变形特征。本文基于脆性指数、断裂韧性、水平应力差及砾石含量等影响因素建立玛湖砂砾岩储集层可压性评价新方法,并结合现场微地震监测结果验证其具有较好适用性。研究结果表明:可压性系数低于0.34的储集层,基本不具备可压性;可压性系数介于0.35~0.64的储集层可压性程度中等,应采用高排量、高黏压裂液进行压裂施工,提高储层改造面积;可压性系数大于0.65的储集层可压性程度高,应优先进行压裂改造。该可压性评价新方法可为砂砾岩储集层工程甜点评价及压裂工程设计提供理论指导。The Mahu sandy conglomerate reservoir is characterized by low porosity,low permeability,strong heterogeneity,high gravel content,etc.The implementation of efficient fracturing is the key to achieving effective exploitation of the reservoir.The rock mechanics experiments and logging data interpretation were carried out on the Mahu conglomerate reservoir,and it was determined that the distribution of mechanical properties of the reservoir is quite different and the samples show elastic-plastic deformation characteristics.Based on the influencing factors such as brittleness index,fracture toughness,horizontal stress difference and gravel content,this paper established a new method for fracability evaluation of the Mahu conglomerate reservoir,and combined with the results of field microseismic monitoring,it was verified that it has good applicability.The research results show that the reservoir with a fracability coefficient lower than 0.34 is barely has the fracability;the reservoir with a fracability coefficient between 0.35 and 0.64 has a medium degree of fracability,and high-displacement and high-viscosity fracturing fluid should be used for fracturing construction to increase the reservoir transformation area;the reservoir with a fracability coefficient greater than 0.65 has a high degree of fracability and should be subjected to fracturing transformation first.This new method for fracability evaluation can provide theoretical guidance for the evaluation of engineering sweet spots in sandy conglomerate reservoirs and the design of fracturing projects.

关 键 词：砂砾岩 可压性评价 微地震监测 岩石力学 水力压裂 

分 类 号：TE357[石油与天然气工程—油气田开发工程] TE357.7