松辽盆地南部陆相页岩油气勘查突破及意义  

Breakthroughs in continental shale oil and gas exploration in the southern Songliao Basin and its implications for carbon neutrality

作　　者：徐兴友 刘卫彬 陈珊 白静 李耀华 XU Xingyou;LIU Weibin;CHEN Shan;BAI Jing;LI Yaohua(Oil and Gas Resources Survey Center,China Geological Survey,Beijing 100083,China)

机构地区：[1]中国地质调查局油气资源调查中心

出　　处：《天然气工业》2022年第3期12-20,共9页Natural Gas Industry

基　　金：中央财政地质调查项目“松辽盆地南部页岩油战略调查”(编号:DD20190115)。

摘　　要：松辽盆地自下而上发育下白垩统断陷层和上白垩统凹陷层双层结构,其中沙河子组二段和青山口组一段分别是断陷层和凹陷层的重要的页岩富集层系。为查明松辽盆地南部长岭凹陷、梨树断陷页岩油气资源潜力,围绕关键地质和工程问题,系统开展古环境恢复、有机地球化学分析、储层精细评价、参数井钻探和地层含油气性测试等工作,部署实施的吉页油1HF和吉梨页油1井分别获高产工业油流和气流,实现了松辽盆地南部陆相页岩油气勘查突破。研究结果表明:(1)长岭凹陷青一段发育陆相高TOC深水层理型和陆相中—高TOC半深水纹层型页岩,其中层理型页岩有机质丰度高、总含油量高,储集空间以层理缝为主,纹层型页岩有机质丰度中等,可动油含量高,储集空间以粒间孔隙为主;(2)梨树断陷沙二段发育一套富钙质、富硅质、富凝灰质的混积页岩,其沉积受控于火山活动、咸化湖盆、层序有序叠置等多重地质事件,该套页岩具有较好的生烃、储集、保存和压裂条件。(3)长岭凹陷青一段实施的吉页油1HF井水平井,首次实施超临界CO_(2)+高黏液造缝复合储层压裂后,获得16.4m^(3)/d的高产页岩油流;梨树断陷沙二段吉梨页油1井,用超临界CO_(2)+N_(2)拌注增能体积压裂后,获得7.6×10^(4)m^(3)/d的高产页岩气流。结论认为,松辽盆地陆相页岩油和页岩气调查的突破对保障国家能源安全和助力“碳中和”具有双重意义,创新形成的超临界CO_(2)高效开发页岩油气与碳地质封存联用技术为实现“增产+去碳”双重目标提供了新思路、新技术。A double-layer structure of Lower Cretaceous fault depression and Upper Cretaceous depression is developed from bottom to top in the Songliao Basin,among which,the second Member of Shahezi Formation and the first Member of Qingshankou Formation are the important shale oil and gas enrichment layers in the fault depression layer and the depression layer,respectively.In order to clarify the shale oil and gas resource potential in Changling Depression and Lishu Fault Depression in the southern Songliao Basin,this paper systematically carries out paleoenvironment restoration,organic geochemical analysis,fine reservoir evaluation,parameter well drilling and oil and gas bearing property test,focusing on key geological and engineering problems.High-yield industrial oil flow and gas flow is produced by wells Jiyeyou 1HF and Jiliyeyou 1,indicating a breakthrough in continental shale oil and gas exploration in the southern Songliao Basin.And the following research results are obtained.First,in the first Member of Qingshankou Formation in Changling Depression develops continental deep water bedding shale with high TOC and continental semi deep water laminar shale with medium-high TOC,among which bedding shale has high organic matter abundance and high total oil content with bedding fractures as the main reservoir space and laminar shale has medium organic matter abundance and high movable oil content with intergranular pores as the main reservoir space.Second,in the second Member of Shahezi Formation in Lishu Fault Depression develops a set of calcareous,siliceous and tuffaceous rich diamictic shale,whose sedimentation is under the control of multiple geological events,such as volcanic activity,saline lake basin and orderly sequence superimposition.This set of shale is better in the conditions of hydrocarbon generation,reservoir,preservation and fracturing.Third,Horizontal Well Jiyeyou 1HF deployed in the first Member of Qingshankou Formation in Changling Depression obtains a high-yield shale oil flow(16.4 m^(3)/d)after the

关 键 词：松辽盆地南部 陆相页岩油气 青山口组一段 沙河子组二段 超临界CO_(2)复合压裂 碳中和意义 

分 类 号：P618.13[天文地球—矿床学]