定边油田东关区延长组长1油层分布规律

发布时间：2018-05-05 11:06

本文选题：定边油田 + 长1　；参考：《西安石油大学》2017年硕士论文

【摘要】：本文将定边油田东关区长1油藏作为研究对象,结合测井、化验分析、试油等资料,从区域构造特征、油源条件、砂体展布及沉积微相特征、储层特征等多方面对长1油藏精细研究,总结其主要油藏类型、油层分布特征及控制因素。依据岩性变化及旋回特征将长1油藏分为长1~1—长1~3共3个油层组。西倾单斜内发育幅度不等的鼻隆;本区长1期处三角洲平原沉积环境,发育北东-南西向带状展布的分流河道砂,其中长1~2砂体发育程度最好,全区有大面积的分流河道砂展布,而长1~1和长1~3则以河道侧翼为主;长1储层以中-细粒长石砂岩及岩屑长石砂岩为主,孔隙类型为残余粒间孔及长石溶孔,孔喉组合为中孔中细吼型,低孔低渗储层,隔夹层的发育使长1储层具较强的非均质性;研究区长1~1和长1~2的含油性较好,长1~3极少见油层分布,长1~1底部油层分布广泛,横向连通性较好,长1~2油层叠置分布,局部见较厚透镜状油层分布。长1主要为构造-岩性油藏,其次为岩性油藏,多为油水同层且油水界面不易辨别。长1油藏距长7烃源岩较远,源岩分布直接控制生烃量;在鼻隆中心及两翼多见油气聚集,故鼻状构造是长1油层分布的主控因素,同时因鼻隆容纳空间过小、油气冲注过剩而在非隆起地带见油层分布;长1油层的展布形态、规模、延伸方向与分流河道展布大体一致,呈片带状展布;长1~1和长1~2优良的储盖组合使其含油性明显好于长1~3;长1储层非均质性较强,具体表现在隔夹层的发育程度及平面上物性变化等方面,隔夹层阻止油气运移,有利于油气聚集成藏。
[Abstract]:In this paper, the Chang 1 reservoir in Dongguan area of Dingbian Oilfield is taken as the object of study. Combining with the data of logging, laboratory analysis and oil testing, the characteristics of regional structure, oil source conditions, distribution of sand bodies and sedimentary microfacies are analyzed. The main reservoir types, reservoir distribution characteristics and controlling factors of Chang 1 reservoir are summarized. According to the lithologic changes and cyclic characteristics, Chang 1 oil reservoir is divided into 3 reservoir groups: Chang 1 Li 1-Chang 1 Li 3. In the first stage of this area, the delta plain sedimentary environment is located and distributary channel sand is distributed in the north east to south west direction, in which the sand body of Chang 1 is the best. The distributary channel sand distributes in a large area in the whole area, while Chang 1Y 1 and Chang 1 Xi 3 are mainly located on the flank of the channel, and Chang 1 reservoir is dominated by medium and fine feldspar sandstone and lithic feldspathic sandstone, and the pore types are residual intergranular pore and feldspar dissolution pore. The pore throat assemblage is mesoporous and low permeability reservoir with low porosity and low permeability. The development of intercalation makes Chang1 reservoir have strong heterogeneity. The lateral connectivity is better, the oil layer of 1 ~ 2 is overlaid, and the distribution of thick lenticular oil layer is observed locally. Chang 1 is mainly a tectonic-lithologic reservoir, followed by a lithologic reservoir, most of which are the same layer of oil and water, and the oil-water interface is difficult to distinguish. Chang1 reservoir is far away from Chang7 source rock, the distribution of source rock directly controls hydrocarbon generation, oil and gas accumulation is more common in the center and flanks of the nose uplift, so the nose structure is the main controlling factor of the distribution of Chang 1 oil layer, at the same time, the space of the nose uplift is too small. The distribution of oil layer in the non-uplift zone is similar to that of distributary channel, and the distribution pattern, scale, extension direction of Chang-1 oil layer are roughly the same as that of distributary channel. The excellent combination of reservoir and caprock of Chang1-1 and Chang1zhu2 makes its oil content obviously better than that of Chang1Q3, and the reservoir of Chang1 has strong heterogeneity, which is manifested in the development degree of intercalation and the change of physical property on the plane, and the interbed prevents oil and gas migration. It is favorable for oil and gas accumulation to form reservoir.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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