松辽盆地深层陆相页岩储层测井评价:以国际大陆科学钻探为例  

Logging evaluation of deep lacustrine shale reservoir in Songliao Basin:a case study of international continental scientific drilling

作　　者：韩双彪 杜欣 白松涛 王成善[3] HAN Shuangbiao;DU Xin;BAI Songtao;WANG Chengshan(College of Geoscience and Surveying Engineering,China University of Mining and Technology,Beijing 100083,China;China Petroleum Logging Co.Ltd.,Xi'an 710077,China;State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]中国石油集团测井有限公司,陕西西安710077 [3]中国地质大学(北京)生物地质与环境地质国家重点实验室,北京100083

出　　处：《中南大学学报（自然科学版）》2022年第9期3271-3286,共16页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(42072168,41802156);国家重点研发计划项目(2019YFC0605405);中央高校基本科研业务费专项基金资助项目(2022YQDC06)。

摘　　要：松辽盆地大陆科学钻探松科2井在深层沙河子组气测异常层段较多,累计厚度大,含气特征明显,揭示了松辽盆地深层陆相页岩层系具有广阔的勘探前景。采用常规和特殊测井方法,结合岩心测试数据,对沙河子组3700~4500 m层段的页岩储层进行评价,运用测井曲线叠合法和交会图法识别页岩含气储层,定量分析页岩储层总有机碳质量分数((w(TOC))、孔隙度、渗透率、脆性以及总含气量等参数,建立相应的解释模型和计算方法。研究结果表明:深层陆相沙河子组页岩含气储层表现出自然伽马高、电阻率高、铀(U)质量分数低、声波时差低、密度低、补偿中子低等特征;3700~4500 m页岩储层w(TOC)局部呈高值,部分层段平均w(TOC)在2%以上;孔隙度分布在0.28%~8.45%之间;渗透率分布在(0.002~0.509)×10^(−3)μm^(2)之间;脆性指数分布范围为19.86%~67.87%;总含气量为1.79~2.57 m^(3)/t;松辽盆地深层陆相页岩储层整体上呈低孔低渗的特征,含气层段较多,3722~3762 m层段、3820~3860 m层段、4100~4150 m层段以及4400~4460 m层段为Ⅰ类含气储层,3890~3940 m层段、4220~4280 m层段和4320~4360 m层段为II类含气储层,具有页岩气资源开发潜力。With large cumulative thickness and obvious gas-bearing characteristics,the Songliao Continental Scientific Drilling SK-2 Well has many anomalous gas logging intervals in deep Shahezi formation,revealing that the deep lacustrine shale strata has good prospects for exploration in the Songliao Basin.Using conventional and special logging methods,combined with the core test data,shale reservoir evaluation was carried out in 3700−4500 m interval of Shahezi formation,logging curve overlay and intersection graph methods were used to identify shale gas reservoirs,the parameters of total organic carbon mass fraction(w(TOC)),porosity,permeability,brittleness and total gas content of shale reservoirs were analyzed quantitatively and interpretation models and calculation methods were established.The results show that the deep lacustrine Shahezi shale gas reservoirs show the characteristics of high natural gamma,high resistivity,low uranium(U),low sonic differential time,low density and low compensation neutrons.The w(TOC)is high in part intervals of 3700−4500 m,and the average w(TOC)of some intervals is above 2%.The porosity is between 0.28%−8.45%,the permeability is(0.002−0.509)×10^(−3)μm^(2),the brittleness index is in the range of 19.86%−67.87%,and the total gas content is 1.79−2.57 m^(3)/t.Generally,the deep lacustrine shale reservoirs are characterized by low porosity and low permeability in Songliao Basin and there are many gas-bearing intervals.The 3722−3762 m,3820−3860 m,4100−4150 m and 4400−4460 m intervals are classified as Type I gas-bearing reservoirs,and the 3890−3940 m,4220−4280 m and 4320−4360 m intervals are Type II gas-bearing reservoirs,which have the potential for shale gas resource development.

关 键 词：松辽盆地 陆相页岩 松科2井 沙河子组 储层评价 

分 类 号：P624[天文地球—地质矿产勘探]