太古界潜山花岗片麻岩储层温度敏感性实验研究  

Experimental study on temperature sensitivity of granite gneiss reservoirs in Archean buried hills

作　　者：付建民 何瑞兵 谭伟雄 游利军[4] 李鸿儒 李鑫磊 康毅力[4] FU Jianmin;HE Ruibing;TAN Weixiong;YOU Lijun;LI Hongru;LI Xinlei;KANG Yili(Tanji Branch of CNOOC Limited,Tianjn City,300459,China;Ssate Key Laboratory of Of shore Oil Exploitin,Tanjin ciy,300459,China;CNOOC Enerlech'Driing&Production Co.,Tianjn Ciy,300459,China;State Key Laboratony of Oil&Gas Reservoir Geology and Expitation,Southwest Perolem Universt,Chengdu Ciry,Sichuan Province,610500,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459 [2]海洋石油高效开发国家重点实验室,天津300459 [3]中海油能源发展股份有限公司工程技术分公司,天津300459 [4]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

出　　处：《油气地质与采收率》2023年第3期42-48,共7页Petroleum Geology and Recovery Efficiency

基　　金：中海石油(中国)有限公司“七年行动计划”重大科技专项“渤海油田上产4000万吨新领域勘探关键技术”(CNOOC-KJ135ZDXM36TJ08TJ);非常规油气层保护四川省青年科技创新研究团队项目“页岩气层氧化协同水力压裂减量增渗方法研究”(2021JDTD0017)。

摘　　要：太古界潜山花岗片麻岩储层岩性复杂、矿物类型丰富,且具有埋藏深度大、储层温度高的特点,高温作用对岩石孔隙结构和渗流特征具有显著的影响。选取太古界花岗片麻岩露头岩样,开展了渗透率温度敏感性评价实验和不同温度下的应力敏感性评价实验,探索渗透率对温度和有效应力的响应特征。结果表明:渗透率为0.1~1mD的花岗片麻岩基块岩样,室温为20七、有效应力为20MPa条件下其渗透率是储层温度为170T、有效应力为20MPa条件下的1.66-2.04倍,随着温度升高,渗透率呈指数递减趋势;氮气驱条件下,20t花岗片麻岩储层应力敏感性为中等偏强,100和170T高温环境下应力敏感性为中等偏弱,随着温度增加应力敏感性有减弱趋势。200t以内适中温度有利于提升岩石强度,弱化岩石应力敏感性。Archean granite gneiss reservoirs are complex in lithology and rich in mineral types,with a large burial depth and high reservoirtemperature,and high temperature has a significant impact on rock pore structure and flow characteris­tics.This paper used samples ofArchean granite gneiss outcrops for experiments to evaluate the temperature sensitivity ofpermeability and the stress sensitivityunder different temperatures and explore the response characteristics ofpermea­bility to temperature and effective stress.The results reveal that forthe samples ofgranite gneiss blocks with permeabili­ty ranging from 0.1 mD to 1 mD,the permeability under the room temperature of20°C and the effective stress of20 MPa is 1.66-2.04 times higher than that under the reservoir temperature of 170°C and the effective stress of20 MPa,and the permeability declines exponentially with the rise in temperature.Under nitrogen flooding conditions,the stress sensi­tivity ofgranite gneiss reservoirs at 20°C is moderately strong,and the stress sensitivity at 100°C and 170°C is moder­ately weak,which tends to weaken with the increase in temperature.A moderate temperature within 200°C is beneficial to improve rock strength and weakens the stress sensitivity ofrock.

关 键 词：潜山油气藏 花岗片麻岩 温度敏感性 应力敏感性 储层损害 评价方法 

分 类 号：TE122.222[石油与天然气工程—油气勘探]