扎哈泉地区上干柴沟组下段致密油藏源、储参数测井评价

发布时间：2018-03-07 15:49

本文选题：致密油藏　切入点：储层评价　出处：《西北大学》2015年硕士论文　论文类型：学位论文

【摘要】：致密油的勘探开发已经成为全球油气资源领域的新的研究热点,除了在北美等地取得巨大成功以外,我国亦在各大陆相含油气盆地中发现了可观的资源量。近年来,柴达木盆地西南部扎哈泉地区第三系上干柴沟组下段发现了致密油藏,钻井获得工业油流。但该区致密油藏在沉积相、烃源岩及油层特征等方面认识程度低,在后续的优势储层识别及含油性解释中遇到了许多困难,急需针对该区地质特征建立有效的源、储关键参数测井评价方法。通过岩心观察、岩心分析化验测试数据及试油试产生产动态资料综合分析,对研究区主要储层及烃源岩地质特征进行了分析。研究表明：研究区上干柴沟组下段岩性复杂、纵向变化快且矿物成分多样,多以砂岩、粉砂岩、泥质粉砂岩、粉砂质泥岩、泥岩及少量泥灰岩薄互层,其中,细砂岩、粉砂岩为主要储层,泥岩、泥灰岩为主要烃源岩；储层孔隙度偏低,孔隙类型以原生残余粒间孔为主,亦可见少量溶蚀粒内孔、晶间微孔及贴粒缝；烃源岩有机质丰度中等偏高,有机质类型较好且成熟度较高。在此基础上,分析储层和烃源岩的测井响应特征并优选测井敏感参数,利用重叠图法、交会图法、多矿物模型法、多元线性回归法、泥质砂岩含水饱和度计算公式等方法建立了研究区致密油藏源、储关键参数定性识别方法及定量解释模型,并对关键井进行了解释。利用解释成果结合试油与生产动态资料分析得出研究区源储配置与储层含油性之间的内在联系：“优质源岩—优质储层”多形成高产油层,“优质源岩—差储层”一般形成差油层或干层,“差源岩—优质储层”一般为水层,源岩与储层条件均较差则一般多为干层或水层。
[Abstract]:The exploration and development of dense oil has become a new research hotspot in the field of oil and gas resources in the world. In addition to the great success in North America and other places, China has also found considerable resources in various continental petroliferous basins. Dense reservoirs were found in the lower member of the Upper Gangchaigou formation of the Tertiary in the southwestern Chahaquan area of Qaidam Basin, and industrial oil flows were obtained by drilling. However, the understanding of the dense reservoirs in this area is low in terms of sedimentary facies, source rocks and reservoir characteristics, etc. Many difficulties have been encountered in subsequent superior reservoir identification and oil-bearing interpretation. It is urgent to establish an effective source and reservoir key parameter logging evaluation method according to the geological characteristics of the area. Based on the comprehensive analysis of core analysis test data and production test production dynamic data, the geological characteristics of main reservoirs and source rocks in the study area are analyzed. The results show that the lithology of the lower member of Shangganchaigou formation in the study area is complex. The longitudinal change is fast and the mineral composition is diverse, most of them are sandstone, siltstone, argillaceous siltstone, silty mudstone, mudstone and a small amount of mudstone thin interbed, among which fine sandstone and siltstone are the main reservoir, mudstone and marlite are the main source rocks. The porosity of reservoir is low, the pore type is mainly primary residual intergranular pore, and a small amount of inner pores, intergranular micropores and sticking fractures can also be found, the organic matter abundance of source rock is relatively high, the organic matter type is better and the maturity is higher. The logging response characteristics of reservoir and source rock are analyzed and logging sensitive parameters are selected. The overlapping map method, cross plot method, multi-mineral model method, multivariate linear regression method are used. Methods such as calculating formula of water saturation in argillaceous sandstone have been used to establish qualitative identification method and quantitative interpretation model of tight reservoir source, key parameters of reservoir and quantitative interpretation model. The key wells were interpreted. The internal relationship between source reservoir configuration and reservoir oil content in the study area was obtained by combining the interpretation results with oil testing and production performance data. "High quality source rock and high quality reservoir" formed high yield reservoir. , "good quality source rock-poor reservoir" generally forms differential reservoir or dry layer, "differential source rock-high quality reservoir" is generally water layer, If the source rock and reservoir condition are poor, they are usually dry or water layer.
【学位授予单位】：西北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P631.81

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