基于岩石物理相分析的“甜点”储层评价  

Evaluation of"sweet spot"reservoir based on petrophysical facies analysis

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作  者:杨凡凡 梁孝伟 印桐檑 焦伟 Yang Fanfan;Liang Xiaowei;Yin Tonglei;Jiao Wei(Key Laboratory of Xinjiang Coal Resources Green Mining,Ministry of Education,Xinjiang Institute of Engineering,Urumqi 830023,China;School of Mining Engineering and Geology,Xinjiang Institute of Engineering,Urumqi 830023,China;Xinjiang Key Laboratory of Coal Measure Resources Exploration and Exploitation,Xinjiang Institute of Engineering,Urumqi 830023,China;Xinjiang Geological Exploration Institute of China Metallurgical Geology Bureau,Urumqi 830063,China)

机构地区:[1]新疆工程学院新疆煤炭资源绿色开采教育部重点实验室,新疆乌鲁木齐830023 [2]新疆工程学院矿业工程与地质学院,新疆乌鲁木齐830023 [3]新疆工程学院新疆煤系资源勘探与开采重点实验室,新疆乌鲁木齐830023 [4]中国冶金地质总局新疆地质勘查院,新疆乌鲁木齐830063

出  处:《能源与环保》2025年第3期99-107,共9页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基  金:新疆工程学院新疆煤炭绿色开采教育部重点实验室自主课题(KLXGY-Z2403)。

摘  要:针对三台油田侏罗系头屯河组一段优质储层划分尚未明确等问题,依托岩心、薄片、测井、粒度分析等资料,采用沉积、成岩和裂缝发育特征耦合的方法来表征岩石物理相,实现了对优质储层的划分。结果表明,沉积相为辫状河三角洲,微相主要发育分流河道、辫流坝、水下分流河道及前三角洲泥4种微相;识别出3种建设性成岩相(孔隙型胶结成岩相、绿泥石衬边弱溶蚀成岩相、不稳定组分溶蚀相)和2种破坏性成岩相(杂基充填成岩相和压嵌型致密成岩相);可见颗粒压碎裂缝,整体对储层物性影响较小。遵循“相叠合”原则划分岩石物理相并预测优质储层分布:PF1对应Ⅰ类储层,物性最好,主要集中在台6—北10井区,建议在此布井;PF2对应Ⅱ类储层,物性较好,多分布在台60、北49、北83井周围,可作为下一步勘探区块;PF3对应Ⅲ类储层,储层物性一般,含砂率低,不宜考虑;PF4对应Ⅳ类储层,物性最差,为非储层。通过耦合沉积、成岩和裂缝发育特征进行优质储层预测,可为具有相同类型的储层研究提供指导。In view of the problems that the delineation of high-quality reservoirs in the first member of the Jurassic System Toutunhe Formation in the Santai Oilfield has not yet been clarified,relying on the data of cores,thin sections,logging,and grain size analysis,the petrophysical phases were characterized by a coupling method of sedimentary,diagenetic,and fracture development characteristics,and the delineation of high-quality reservoirs was achieved.The results indicate that:the sedimentary microfacies are braided river delta,and the microfacies mainly consist of four types:distributary channels,braided flow dams,submerged distributary channels,and pre delta mud;three constructive diagenetic facies are identified(pore-type cemented diagenetic facies,chlorite lined weakly dissolved diagenetic facies,unstable component dissolved facies),and two destructive diagenetic facies(heterogeneous basement filling diagenetic facies and compression embedded dense diagenetic facies);the particle crushing cracks can be seen,and the overall impact on the physical properties of the reservoir is relatively small.Following the principle of"phase stacking",the petrophysical facies are classified and the distribution of high-quality reservoirs is predicted:PF1 corresponds to ClassⅠreservoirs,with the best physical properties,which are mainly concentrated in the well area of Tai 6-North 10,and it is recommended to deploy wells here;PF2 corresponds to ClassⅡreservoirs,with better physical properties,which are mostly distributed around wells of Tai 60,North 49 and North 83,and it can be used as a block of the next step of exploration;PF3 corresponds to ClassⅢreservoirs,which has average physical properties and low sand content,and should not be considered;PF4 corresponds to ClassⅣreservoir,which has the worst physical properties and is a non-reservoir.The prediction of high-quality reservoirs was carried out by the method of coupling sedimentary,diagenetic and fracture development characteristics,in order to provide guidance for th

关 键 词:岩石物理相 沉积微相 成岩相 裂缝相 头屯河组 三台油田 

分 类 号:TE122.2[石油与天然气工程—油气勘探]

 

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