姜雪岩,张淑娟,王治国,刘海龙,赵春宇,王贺军
JIANG Xueyan,ZHANG Shujuan,WANG Zhiguo,LIU Hailong,ZHAO Chunyu,WANG Hejun

• 1:大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

套损一直是困扰老油田开发的难题。大庆长垣油田局部区块出现集中套损,严重影响油田生产。地质因素是导致套管损坏的重要原因之一,由于长垣油田开发区块众多,区块间地质特征差异明显,套损形式区别较大,油田南部套损更为严重。在套损地质因素分析基础上,优选出地层倾角、断层发育、砂泥界面、化石层等4项地质因素单指标,并采用确定性系数将其进行同区间量化和叠加,确定出各单指标权重,得到地质因素套损风险度。将长垣油田98个细化区块的地质因素套损风险划分为5个等级,其中长垣油田西侧地层倾角较大,南部化石层较为发育,套损风险度高,是套损防护的重点区块。
Casing damage has always been an issue in the old oilfield development. The casing damages in the partial blocks of Daqing Placanticline Oilfields are centralized,thus these oilfield productions are severely influenced.The geological factor is one of the important reasons of the casing damages. The oilfields have so many blocks,and furthermore the differences of the geological characteristics between the blocks are rather obvious,so the casing damages are quite different,the casing manages in the southern oilfields are more serious. On the basis of the analysis of the geological influencing factors,four individual indexes of the factors were optimized: formation dip,fault development,sandstone-mudstone interface and fossil bed. And moreover by means of the certainty factor,each index was quantified and stacked in the same interval,and then the single index weight was determined,the casingdamage risk degrees of the geological factors were obtained. Five grades of the risk were divided for 98 refined blocks in Placanticline Oilfields,in detail due to the relatively large formation dips in the west parts of Placanticline Oilfields and well-developed fossil beds in the south,the casing-damage risk degrees are rather higher,so they have become the key protecting blocks of the casing damage.

关键词(KeyWords)： 大庆长垣;地质因素;套损;风险度;权重
Daqing Placanticline;geological factor;casing damage;risk degree;weight

Abstract:

Keywords:

基金项目(Foundation): 中国石油天然气股份有限公司重大科技专项“大庆油田原油4000万吨持续稳产关键技术研究”(2008E-1206)

作者(Author): 姜雪岩,张淑娟,王治国,刘海龙,赵春宇,王贺军
JIANG Xueyan,ZHANG Shujuan,WANG Zhiguo,LIU Hailong,ZHAO Chunyu,WANG Hejun

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