济阳坳陷成熟探区探井失利地质原因分析

Prospect well unsuccessful geologic analysis of causes method in Jiyang Depression

高磊

Gao Lei

中国石油化工股份有限公司胜利油田分公司地质科学研究院, 山东东营 257015

Geologic Scientific Research Institute, SINOPEC Shengli Oilfield Company, Dongying 257015

胜利油田经过近40多年的勘探,按照国内外勘探程度划分的标准,其主力探区济阳坳陷目前已处于成熟勘探程度,全面进入隐蔽油气藏勘探阶段,勘探难度越来越大。尽管济阳坳陷探井成功率保持较高的水平,但仍有50%左右的探井落空或低效。根据"失利"探井定义,从生、储、盖、圈、运、保等6种油气成藏控制因素出发,参考济阳坳陷石油地质特点和近几年的勘探经验,主要从圈闭是否有效、储层是否存在、输导体系是否发育、油气充满程度等4个方面进行失利探井地质原因分析,建立起成熟探区探井失利地质原因分析方法。总结了济阳坳陷"十五"以来主要增储目标,即:砂砾岩体、浊积砂体、滩坝砂体、河道砂体等储层类型的失利地质原因。在明确上述目标类型最主要勘探风险的基础上,提出了勘探攻关重点及风险规避建议。

After nearly 40 years of exploratory development, Jiyang Depression entered into mature development stage and its exploration targets are subtle reservoirs now which brought great difficulty for exploration.Though the successful rate of exploratory wells in Jiyang Depression is high, but there are nearly 50% wells failed or with low efficiency.According to the definition of unsuccessful exploratory well, based on 6 controlling accumulation factors such as source rock, reservoir, cap rock, trap, transportation and seal, failed well analysis method was built in terms of effective trap, existing reservoir, developed transportation system, and oil and gas fullness.Sand conglomerate, turbidite, beach bar and channel sand formations were the stimulation targets in Jiyang Depression in the "10th five year" plan, but they were not successful.Principal exploration risks of above-mentioned formation types were identified and risk aversion were proposed in this paper.

https://doi.org/10.3969/j.issn.1008-2336.2010.01.008