摘要
为定量研究油气跨断层侧向运移的可能性及发生部位,利用双井Knipe图解法识别反向断层和顺向断层上、下盘地层砂-砂并置部位及并置模式,结合试油区域断层侧向封闭油气下限法,建立1套油气跨断层侧向运移部位定量评价方法。将该定量评价方法应用于渤海湾盆地冀中坳陷霸县凹陷文安斜坡史各庄鼻状构造带古近系沙河街组一段和二段(简称沙一段、沙二段),确定断层上、下盘地层砂-砂并置部位及沙一段和沙二段的断层泥比率(SGR)下限值分别为26%和29%,由此厘定出油气跨断层侧向运移的发生部位。通过分析沙一段和沙二段的油气分布特征及沙一段4口井含氮化合物的变化趋势,与油气跨断层侧向运移可能发生部位的定量评价结果一致,初步验证了评价方法的可行性。
To quantitatively study the possibility and location of lateral migration of oil and gas across faults, a quantitative evaluation method for lateral migration of oil and gas across faults was established using the Shuangjing Knipe graphic method to identify the juxtaposition site and juxtaposition patterns of sand and sand in the upper and lower walls of the reverse faults and the consequent faults, combined with the oil and gas limit method of fault lateral seal in the test oil area. The quantitative evaluation method was applied to the first and two members of the Paleogene Shahejie strata(referred to as Es1 and Es2) of Shigezhuang nose structure of Wen'an slope in Baxian sag, Jizhong depression, Bohai Bay Basin, to determine the juxtaposition site of sand and sand in the upper and lower walls of the fault, and the shale gouge ratio(SGR) lower values are 26% and 29% respectively in the strata Es1 and Es2. Thus, the location of lateral migration of oil and gas across faults was determined. Based on the oil and gas distribution characteristics of the strata Es1 and Es2, and variation trend of nitrogen compounds in 4 wells in the strata Es1, the results were consistent with the quantitative evaluation of the location of lateral migration of oil and gas across faults, the feasibility of the evaluation method was preliminarily verified.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2017年第6期880-888,共9页
Petroleum Exploration and Development
基金
国家自然科学基金项目(41372154
41602154
41572127)
国家科技重大专项(2016ZX05007003-003
2016ZX05006-005)
中国石油科技创新基金(2015D-5006-0103)