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机构地区:[1]中国石化西北油田分公司工程监督中心,新疆轮台841600 [2]胜利油田测井公司资料解释研究中心,山东东营257096
出 处:《中外能源》2012年第7期53-56,共4页Sino-Global Energy
摘 要:在水平井中,井眼轨迹与顶界面地层之间的距离将直接影响测井响应、测井资料解释结果以及油藏开发效果。在碎屑岩水平井中,常规资料由于受到来自井筒环境和仪器偏心的影响,很难对油层进行有效评价。在储层较薄的碎屑岩水平井解释中引入避水高度的计算,一定程度上排除了测井曲线受井眼环境影响对测井解释的干扰;在储层较薄的碎屑岩储层,水平井资料受地层界面影响较大,在没有合适校正方法时,应尽量选用能反映储层自身信息的测井资料。根据各种资料受地层界面的影响情况,建议选择探测深度较浅的测井资料进行评价,如:自然伽马(自然电位)、井径、中感应及八侧向、补偿中子。以塔河油田S1H井为例,利用测井资料对水平井井眼轨迹进行分析,并对其在水平井测井资料认识和避水高度计算等应用上进行探讨。The distance between the trajectory of horizontal well and upper interface of layer directly affects the well logging response and the following interpretation on the logging information and the development effect of oil reservoirs.In the horizontal well of the clastic rocks,oil-bearing formations can′t be evaluated effectively because conventional data is influenced by borehole environment and decentralization of the equipment.For thin clastic reservoirs,the calculation of height of water avoidance is introduced in horizontal well interpretation,which removes the disturbance of influence of borehole environment on logging curve to some extent.Information of the horizontal well is influenced by formation boundary greatly,and the log information reflects reservoir information should be applied when lacking of appropriate corrector method.According to the influence of the formation boundary on all kinds of information,log information with shallow investigation depth should be selected for evaluation,such as gamma ray(self potential),caliper,medium induction and laterolog 8 and compensated neutron log.Based on the Well S1H of Tahe oilfield,the trajectory of horizontal well is analyzed through log information.Also we discuss its application to understanding of the log information of horizontal well and calculating of height of water avoidance.
分 类 号:TE355.6[石油与天然气工程—油气田开发工程]
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