辽河油田大民屯坳陷沙四段储层综合评价

发布时间：2019-02-08 21:29

【摘要】：我国相继在西部的塔里木、大庆、河南、辽河等地致密砂岩获高产油气流,证实了我国的致密砂岩储层的油气资源潜力是巨大的。辽河油田在七十年代初期就提出并开始加强致密砂岩的勘探工作以寻找新的油气藏,如双台子和牛居地区的致密砂岩勘探等现已初具规模。目前,致密砂岩的油气勘探工作的范围正逐年扩大,随着工作的深入对致密砂岩油气藏的类型、油气藏的生、贮、盖等都有了一定的了解。而且在大民屯地区致密砂岩的油气勘探成效显著,储层类型多,单井产量高,证明该区致密砂岩具有很大的油气勘探潜力,因此扩大致密砂岩勘探的范围、加强并提高致密砂岩油气的认识是必要的。本文中引进了储层品质指数及裂缝孔隙度,并结合阵列感应、核磁和阵列声波等测井新技术来对沙四致密储层的储集性能、含油气情况等进行评价。最终,结合工区油藏综合地质特征研究以及本问所建立建立的油气层识别标准和储层参数解释模型的基础上,开展测井二次精细处理解释,研究工区内油气水分布规律。应用本文所提出的方法,首先对研究区重点井进行了二次评价,综合分析测井资料和试油数据可知,位于该前进构造带高部位新前601——L7井一线所部井沙四段砂体储层较发育,储层物性较差,但含油性较好,属低孔低渗储层;该区油藏类型为构造岩性油气藏,油气分布规律受前进大断层和岩性特征所控制,在靠近前进大断层的高部位和岩性好的油气富集。L257块沙四上段以泥岩为主,局部加砂砾岩、粉砂岩,厚度一般为200—500米,下段以厚层块状凝灰质角砾岩、浅灰色砂砾岩、细砂为特征,厚度一般为300-600米,其中所含碎屑岩为沙四段主要含油砂体。通过对研究区块内钻达沙四的185口井测井资料二次解释评价,建立了油气水层的电性解释标准,提高了解释精度。
[Abstract]:In Tarim, Daqing, Henan and Liaohe regions in the west of China, high oil flow has been obtained in dense sandstone, which proves that the oil and gas resource potential of tight sandstone reservoir in China is great. Liaohe Oilfield proposed and started to strengthen the exploration of tight sandstone in the early seventies to find new oil and gas reservoirs, such as the dense sandstone exploration in Shuangtaizi and Niuju areas, which has begun to take shape. At present, the scope of oil and gas exploration of tight sandstone is expanding year by year. With the development of the work, there is a certain understanding of the types, generation, storage and cap of tight sandstone reservoirs. Moreover, in Damingtun area, the oil and gas exploration results of tight sandstone are remarkable, there are many reservoir types, and the single well production is high, which proves that the compact sandstone in this area has great oil and gas exploration potential, so the scope of tight sandstone exploration is expanded. It is necessary to strengthen and improve the understanding of tight sandstone oil and gas. In this paper, the reservoir quality index and fracture porosity are introduced, and new logging techniques such as array induction, nuclear magnetic field and array acoustic wave are combined to evaluate the reservoir performance, oil and gas content of the tight reservoir of Sha 4. Finally, based on the study of the comprehensive geological characteristics of the reservoir in the working area and the oil and gas reservoir identification standard and the reservoir parameter interpretation model established by this paper, the secondary fine processing interpretation of logging is carried out to study the distribution of oil, gas and water in the working area. Using the method proposed in this paper, the second evaluation of the key wells in the study area is first carried out, and the log data and the test data are analyzed synthetically. The sand body reservoir of Sha 4 member in the first line of 601--L7 well located in the high part of the forward structural belt is relatively developed, the reservoir physical property is poor, but the oil content is better, so it belongs to low porosity and low permeability reservoir. The reservoir type in this area is structural lithologic reservoir. The distribution of oil and gas is controlled by the advance fault and lithologic characteristics. The reservoir is enriched in the high position and good lithologic oil and gas near the great advancing fault. The upper part of Sha 4 in block L257 is dominated by mudstone, and the local sand gravel is added. The siltstone is usually 200-500 meters thick, and the lower part is characterized by thick layer massive tuffaceous breccia, light gray gravelly rock, fine sand, and the thickness is generally 300-600 meters. The clastic rock contained in the siltstone is the main oil-bearing sand body in the fourth member of Shahejie formation. Based on the secondary interpretation and evaluation of 185 logging data of Dasha 4 in the study block, the electrical interpretation standard of oil-gas and water reservoir is established and the interpretation accuracy is improved.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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