马朗凹陷卡拉岗组地层水化学特征与油气聚集关系  

THE HYDROGEOCHEMICAL CHARACTERISTIC OF CARBONIFEROUS KALAGANG FORMATION(C_2k) AND LTS RELATIONSHIP WITH OIL-GAS ACCUMULATION IN MALANG DEPRESSION

作　　者：刘媛萍[1] 徐星安 尹诗琪[3] 刘俊田 

机构地区：[1]成都理工大学,四川成都610000 [2]河南省煤层气开发利用有限公司,河南郑州450016 [3]长江大学工程技术学院,湖北荆州434020 [4]中国石油吐哈油田分公司勘探开发研究院,新疆哈密839009

出　　处：《新疆石油天然气》2013年第2期1-6,共6页Xinjiang Oil & Gas

摘　　要：油气的生成、运移、聚集、保存和散失都是在地层水的环境里或是在地层水的参与下进行的。地层水运动是油气运移聚散的动力和载体,其化学成分直接或间接地反映出油气赋存的环境与条件。地层水与油气在地质历史进程中的活动是相互依存、制约的因果关系。文中从水文地质观点和角度研究出发,利用地层水化学特征的各种参数,如变质系数、脱硫系数、碳酸盐平衡系数、氯镁系数等组合特征,分析油气的保存条件、地层的封闭程度及油气的运移条件,旨在通过水化学的变化特征来掌握地层水对油气藏形成和分布的作用,寻找有利的油气聚集带。研究表明:三塘湖盆地马朗凹陷上石炭统卡拉岗组地层水具有矿化度高和氯镁系数越大,变质系数、脱硫系数和碳酸盐平衡系数就越小的特点,矿化度、水性系数及水型的变化具有很好的一致性,表明该区存在有利于油气保存的水文地质条件。分析认为,斜坡区地层水地质环境稳定,封闭条件好,利于油气聚集保存。The Hydrocarbon generation,migration,aggregation,saved and lost are in the environment of formation water or the participation of the formation water.The formation water movement is the hydrocarbon migration and accumulation of power and carrier.Its chemical composition,directly or indirectly reflects the environment and conditions for oil and gas accumulation.the Formation water and oil and gas in the process of geological history are interdependent and they constraint to each other.From the hydrogeological point of view to take advantage of the various chemical characteristics parameters of the formation water,as rNa+/rCl-ratios、(rSO42-×102) /rCl-ratios、(rHCO3-+ rCO32-) /rCa2+ ratios、rCl-/rMg2+ ratio and combined features.Analysis of the oil and gas storage conditions,the degree of closure of the strata,and oil and gas migration conditions,from chemistry characteristics of formation water is done,in order to master distribution of oil and gas reservoirs and look for favorable hydrocarbon accumulation zone.The stuldy shows that the formation water of Kalagang Formation in Santanghu Basin,with higher of salinity and rCl-/rMg2+ ratios,rNa+/rCl-ratios、(rSO42-×102)/rCl-ratios、(rHCO3-+ rCO32-)/rCa2+ ratio are lower.Salinity,the waterborne coefficient and water changes have good consistency.That hydrogeological conditions are favorable to the preservation of oil and gas in the area.The analysts believe that the formation water geological environment is stable and has the closed conditions in the slope zone,so it is conducive to hydrocarbon accumulation.

关 键 词：地层水 水化学特征 油气保存条件 卡拉岗组 上石炭统 马朗凹陷 

分 类 号：TE122.1[石油与天然气工程—油气勘探]