考虑脱气影响下缝洞型油藏的动态储量计算新模型  

Dynamic Reserve New Calculation Model for Fracture-Vuggy Reservoirs Considering the Effect of Dissolved Gas Precipitation

作　　者：王鸿鹏 肖云 刘春雷 乐平[3] 秦昊 耿春颖 WANG Hongpeng;XIAO Yun;LIU Chunlei;YUE Ping;QIN Hao;GENG Chunying(Geological Research Institute,China National Logging Corporation,Xi’an,Shaanxi 710077,China;Donghe Oil and Gas Production Management Area,Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Well Logging Key Laboratory,China National Petroleum Corporation,Xi’an,Shaanxi 710077,China;Sinopec Northwest Oilfield Company,Urumchi,Xinjiang 830011,China)

机构地区：[1]中国石油集团测井有限公司地质研究院,陕西西安710077 [2]中国石油塔里木油田分公司东河采油气管理区,新疆库尔勒841000 [3]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [4]中国石油天然气集团有限公司测井重点实验室,陕西西安710077 [5]中石化西北油田分公司,新疆乌鲁木齐830011

出　　处：《测井技术》2024年第4期520-526,共7页Well Logging Technology

基　　金：中国石油天然气集团有限公司“十四五”前瞻性基础性重大科技项目“不同类型边底水气藏控水采气技术研究”(2021DJ3301)。

摘　　要：缝洞型油藏内部空间结构复杂,流体分布形式多样,裂缝-溶洞储集体中水体能量与溶解气体的存在对动态储量计算有明显影响。油藏工程的物质平衡方法不考虑储集体内部结构与生产过程中油气混相状态与水体能量影响,仅根据储层压力变化与累计注、采量对储量进行计算。以油藏工程常规物质平衡法为基础,引入表征水体能量的参数,考虑油藏开发中溶解气体对储量的影响,修正综合体积压缩系数,建立动态储量计算新模型,弥补现有计算方法对综合体积压缩系数因素考虑不全的缺陷。实例分析表明,与其他动态储量计算模型进行对比,随着水体能量增大,油藏储量逐渐减小。相同水体能量下,溶解气析出,原油体积系数变大,油藏储量也减小。计算结果表明使用新模型计算更加符合缝洞型油藏地质储量的实际情况,为该类油藏储量计算提供一种新方法。The internal spatial structure of fractured-karst reservoirs is complex,and the fluid distribution forms are diverse.The existence of water bodies and dissolved gases in the fracture-karst reservoir collective has a significant impact on dynamic reserves calculation.The material balance method of reservoir engineering does not consider the internal structure of the reservoir and the miscible state of oil and gas in the production process,and only calculates the reserves according to the change of reservoir pressure and the cumulative injection and production.Based on the conventional mass balance method of reservoir engineering,this paper introduces the parameters to characterize the energy of the water body,considers the influence of dissolved gas on reserves in reservoir development,corrects the comprehensive volume compressibility coefficient,and establishes a new model for dynamic reserve calculation,which makes up for the shortcomings of the existing calculation methods that do not fully consider the factors of comprehensive volume compressibility coefficient.The analysis of the example wells shows that compared with other dynamic reserve calculation models,the reservoir reserves gradually decrease with the increase of water energy.Under the same water energy,the dissolved gas is precipitated,the volume coefficient of crude oil becomes larger,and the reservoir reserves also decrease.The settlement results show that the model can more accurately characterize the actual situation of fractured-vuggy reservoir development,and provides a new method for calculating the reserves of this type of reservoir.

关 键 词：物质平衡法 缝洞型油藏 动态储量计算 溶解气 

分 类 号：P631.84[天文地球—地质矿产勘探]