琼东南盆地松南低凸起潜山储层包裹体发育及油气成藏特征  

Reservoir inclusions development and hydrocarbon accumulation characteristics of the buried hills in Songnan low uplift,Qiongdongnan Basin

作　　者：黄俨然[1,2] 唐宏宝 谭超 杨鹏宇 张炜 高钧健 HUANG Yanran;TANG Hongbao;TAN Chao;YANG Pengyu;ZHANG Wei;GAO Junjian(School of Earth Sciences and Spatial Information Engineering,Hunan University of Science and Technology,Xiangtan,Hunan 411201,China;Hunan Provincial Key Laboratory of Shale Gas Resource Exploitation,Hunan University of Science and Technology,Xiangtan,Hunan 411201,China;Engineering Technology Department,BHDC,CNPC,Tianjin 300457,China;No.1 Mud Logging Company,BHDC,CNPC,Tianjin 300280,China)

机构地区：[1]湖南科技大学地球科学与空间信息工程学院,湖南省湘潭市411201 [2]湖南科技大学页岩气资源利用湖南省重点实验室 [3]中国石油渤海钻探工程技术部 [4]中国石油渤海钻探第一录井公司

出　　处：《录井工程》2024年第4期108-115,共8页Mud Logging Engineering

摘　　要：目前琼东南盆地松南低凸起的勘探程度相对较低,潜山储层发育的规律性并不明显,物性变化较大,且低凸起上的构造及演化特征差异明显,其天然气富集成藏特征及影响因素是后续勘探开发所面临的亟需解决的问题。通过对松南低凸起上实钻井潜山储层包裹体的发育特征、均一温度分布,储层及圈闭特征和成藏过程研究,并结合失利井剖析,详细阐述油气充注富集成藏过程,明确松南低凸起潜山领域油气成藏模式。研究表明:区内发育多种类型的次生成因包裹体,主要发育在石英颗粒内或颗粒群裂隙带内,呈线状或带状分布;潜山储层的包裹体中大多有烃类显示,表明接受过油气的注入;含烃盐水包裹体的均一温度分布显示部分地区主要有一次油气充注;含CO_(2)盐水包裹体的均一温度普遍高于含烃盐水包裹体,并且普遍高于地层所经历的古温度,反映了来自深部富含CO_(2)高温流体的破坏作用,对晚期构造的破坏影响较大。综合含气井和失利井的成藏过程分析,明确了主要的成藏控制因素是盖层封盖能力和深部高温流体破坏的程度,为后续勘探开发提供了理论依据。Songnan low uplift in Qiongdongnan Basin has relatively low level of exploration untill now.The regularity of buried hill reservoirs development is not obvious,and the physical properties change greatly,and there are significant differences in structural and evolutionary features on the low uplift.The enrichment and accumulation characteristics and influencing factors of the natural gas are urgent issues to be addressed in subsequent exploration and development.By studying the development characteristics and homogenization temperature distribution of reservoir inclusions,characteristics of reservoirs and traps as well as pool-forming process of buried hills drilled in Songnan low upright,and combined with the analysis of failed wells,the process of hydrocarbon charging,enrichment and accumulation are elaborated in detail,and the hydrocarbon pooling pattern in the buried hill field of Songnan low upright is clarified.This study presents that this area develops various types of inclusions,all of which are secondary in origin.These inclusions are mainly developed within quartz grains or grain-boundary fracture zones,appearing as linear or band-like distributions.Most of the inclusions in buried hill reservoirs show hydrocarbons,indicating that they have received oil and gas injection.The distribution of homogenization temperatures in hydrocarbon-containing brine inclusions suggests that there is main one hydrocarbon charging in parts of the buried hill.CO_(2)-containing brine inclusions generally have higher homogenization temperatures than hydrocarbon-containing brine inclusions and the paleotemperature experienced by the strata,reflecting the destructive effect of deep CO_(2)rich high-temperature fluids,which has a significant impact on the destruction of late stage structures.The sealing capacity of caprock and the destruction degree from deep high-temperature fluids are the key control factors for hydrocarbons accumulation based on the analysis of accumulation process of gas bearing wells and failed wells,provid

关 键 词：包裹体 琼东南盆地 松南低凸起 深水区 油气成藏 

分 类 号：TE132.1[石油与天然气工程—油气勘探]