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时间:2020-01-14
《断层侧向封闭性定量评价方法.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、石油勘探与开发3102016年4月PETROLEUMEXPLORTIONANDDEVEL0PMENTVb1.43NO.2文章编号:1000—0747(2016)02-0310—07DOI:10.11698/PED.2016.02.20断层侧向封闭性定量评价方法吕延防,王伟,胡欣蕾,付广,史集建,王超,刘哲,姜文亚2(1.东北石油大学;2。中国石油大港油田公司勘探开发研究院)基金项目:国家自然科学基金“断层岩水压张裂漏油主控因素及张性破裂压力预测”(41372154)摘要:基于断层封闭性机理及其影响因素研究,在考虑断层承压时间的情况下对断层封闭性定量评价的断一储排替压力差法进行改进,
2、建立了考虑时间因素的断层封闭性定量评价地质与数学模型。采用给定步长、逐渐逼近的算法,确定围岩地层岩石具有与靶点断层岩相同泥质含量和成岩程度的埋深,再根据研究区所建立的岩石泥质含量和埋藏深度乘积与排替压力的关系,定量计算出靶点断层岩的排替压力,用目的盘储集层排替压力与之比较,定量评价断层的封闭与否及封闭能力的大小。通过歧口凹陷板桥断层圈闭油气藏的实际资料的验证,以及与断层岩的泥质含量(SGR)法和未考虑承压时间的断一储排替压力差评价断层封闭性方法的比较,证实该方法具有更好的可行性和更高的可信度。图5表1参18关键词i歧口凹陷;断层岩;侧向封闭性;封闭性定量评价;排替压力中图分类号:T
3、E122文献标识码:AQuantitativeevaluationmethodoffaultlateralsealingLYUYanfang,wANGwei,HuXinlei,FuGuang,SHIJijian,wANGChao,LIUZhe,JIANGWenya。(1.NortheastPetroleumUniversity,Daqing163318,China;2.PetroChinaDagangOilfieldCompany,Tianjin300280,China)Abstract:Thefault—reservoirdisplacementpressuredifferent
4、ialmethod.asaquantitativeevaluationmethodoffaultsealingwhichconsideringdiagenetictimeoffaultrock,wasimprovedbasedonthestudyoffaultsealingmechanismanditsinfluencingfactors.Ageologyandmathematicalmodelofquantitativeevaluationoffaultsealingconsideringdiagenetictimewasestablished.First,thedepthofs
5、urroundingrockwhichhasthesameshalecontentanddiageneticdegreeasthefaultrocksatthetargetwasdeterminedusingthemethodofsuccessiveapproximationatthegivensteplen~h.Second,thedisplacementpressureoftargetfaultrockswascalculatedbasedontherelationshipbetweenthedisplacementpressureandtheproductofshalecon
6、tentandburialdepththatwasestablishedforthestudyarea.Andthird,thesealingstatesandcapacityofthefaultswerequantitativelyevaluatedbycomparingthecalculateddisplacementpressurewiththatofthetargetreservoir.BytheacmaldataofreservoirsatBanqiaofaultinQikousagandtheresultcomparisonbetweenfaultrockshaleco
7、ntentmethod(SGR)andfault-reservoirdisplacementpressurediferentialmethodwithoutconsideringthebearingtime,itisverifiedthatthismethodismorefeasibleandcredible.Keywords:QikouSag;faultrock;lateralsealingability;sealingabilityquantitativeeval
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