王府断陷深层气藏火山岩储集层可压性评价  

Evaluation of Fracability of Volcanic Reservoir in Deep Gas Reservoirs of Wangfu Fault Depression

作　　者：刘光玉 王卫明 王艳玲 LIU Guangyu;WANG Weiming;WANG Yanling(Research Institute of Oil Production Technology,Jilin Oilfield Company,PetroChina,Songyuan,Jilin 138000,China;Research Institute of Petroleum Engineering,Sinopec,Beijing 100011,China)

机构地区：[1]中国石油吉林油田分公司油气工程研究院,吉林松原138000 [2]中国石化石油工程技术研究院,北京100011

出　　处：《新疆石油地质》2020年第3期359-364,共6页Xinjiang Petroleum Geology

基　　金：国家科技重大专项(2016ZX05046-004)。

摘　　要：王府断陷深层气藏火山岩储集层具有埋藏深、物性差等特征,传统的开采手段受限,需进行压裂改造才能有效建产。以王府断陷深层气藏火山岩储集层为研究目标,通过岩石力学实验和声发射测试,综合岩石的各向异性、脆性、应力敏感性、天然裂缝密度、声发射活动性等共同评价储集层的可压性和造缝能力。研究表明:王府断陷深层气藏火山岩脆性矿物含量高,抗压强度较大;岩石弹性波速变化范围大,应力敏感性有一定的差异性,天然裂缝各向异性弱;储集层存在一定的流体敏感性,但敏感性强弱程度不一;蒸馏水和质量分数为15%的KCl溶液的造缝能力较强。储集层可压性综合评价对优选压裂层位、压裂液体系和设计压裂改造方案提供理论指导,为王府断陷深层气藏的勘探开发提供依据。The volcanic rocks in the deep gas reservoir of Wangfu fault depression are characterized by deep burial and poor physical prop⁃erties,so the conventional production methods cannot get good effects and it is need to carry out fracturing stimulation in this kind of reser⁃voirs.Taking the volcanic rock in the deep gas reservoir in Wangfu fault depression as the research object and based on rock mechanics ex⁃periment and acoustic emission test,the fracture making ability and fracability of the reservoir are comprehensively evaluated by combining the anisotropy,brittleness,stress sensitivity,natural fracture density and acoustic emission activity of the rock.The results show that the volcanic rocks in the deep gas reservoir of Wangfu fault depression have high content of brittle minerals and high compressive strength;the elastic wave velocity of the rock varies a lot,the stress sensitivity is different and the anisotropy of natural fractures is weak;the reservoir is sensitive to fluids and the fluid fracture making ability are relatively strong when distilled water and KCl solution with the mass fraction of 15%are used.The comprehensive evaluation of reservoir fracability can provide theoretical guidance for the optimization of fracturing hori⁃zon and fracturing fluid and design of fracturing plan,meanwhile provide basis for exploration and development of the deep gas reservoirs in Wangfu fault depression.

关 键 词：王府断陷 深层气藏 火山岩 可压性 压裂改造 力学特性 天然裂缝 造缝能力 

分 类 号：TE112.24[石油与天然气工程—油气勘探]