摘要
全球深水区油气资源量丰富且具有巨大的勘探潜力,白云凹陷是南海北部珠江口盆地深水油气勘探的热点区域。在技术和成本条件的约束下,利用成岩相测井响应特征来研究储层的方法是目前海洋油气勘探从浅水走向深水的有效手段之一。通过镜下薄片观察、扫描电镜观察、碳氧同位素等分析测试手段,对白云凹陷北坡中深部储层基本特征、典型成岩作用类型、成岩相组合类型及其测井响应标志进行了分析。研究发现,白云凹陷北坡中深部储层经历的主要成岩作用为压实作用、胶结作用和溶蚀作用,是影响储层物性的关键因素;同时将目的储层划分为强胶结—弱溶蚀相、弱压实—强溶蚀相、中等压实—较强溶蚀相和强压实—弱溶蚀相4种成岩相类型,对成岩相具有较高灵敏度的声波时差、自然伽马以及电阻率曲线的响应特征进行分析,并初步建立了区域性的成岩相测井识别标准。旨在对无取心或者少取心井段开展储层成岩作用的相关研究,为白云凹陷深水区进一步油气勘探提供科学依据和思路借鉴。
The deepwater oil and gas resource is abundant and has a great potential of exploration.Baiyun Sag is a hot area of deepwater oil and gas exploration in Pearl River Mouth Basin,north South China Sea.Due to technology and cost conditions,the method of using diagenetic facies logging response characteristics to study reservoirs is one of the effective measures from shallow to the deepwater in offshore oil and gas exploration at present.With the methods of thin sections,casting thin sections,scanning electron microscope,oxygen and carbon isotope analysis,this paper analyzes the basic characteristics of reservoir,typical diagenesis types,diagenetic facies assemblage types and its logging response marks.The study shows that the main diagenesis developed in the medium-deep reservoirs of the north slope of Baiyun Sag is compaction,cementation and dissolution,which are key factors to affect the reservoir physical property.The diagenesis facies of reservoirs in the study area is qualitatively divided into four types,including strong cementation-weak dissolution facies,weak compaction-strong dissolution facies,moderate compaction-strong dissolution facies and strong compaction-weak dissolution facies.Then,based on the analysis of conventional logging curves,such as acoustic transit time log,gamma log and resistivity log,which are sensitive to diagenetic facies,this paper establishes the logging identification standard of deagenetic facies.The final aim of this study is to provide a scientific basis and reference approach for the further oil and gas exploration in deepwater of Baiyun Sag.
作者
牟炜卫
王琪
田兵
郝乐伟
胡子见
Mou Wei-wei;Wang Qi;Tian Bing;Hao Le-wei;Hu Zi-jian(Key Laboratory of Petroleum Resources,Gansu Province/Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,Chinese Academy of Sciences,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100049,China;Gas field Development Department,Changqing Oilfield Company,Petrochina,Xi'an 710018,China)
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2017年第10期1601-1612,共12页
Natural Gas Geoscience
基金
国家科技重大专项(编号:2016ZX05026-007-05)资助
关键词
成岩相
测井响应特征
中深部储层
白云凹陷
珠江口盆地
Diagenesis facies
Logging response characteristics
Medium-deep reservoirs
Baiyun Sag
Pearl River Mouth Basin
