准噶尔盆地西北缘夏79井区井—地电法目标储层油气预测研究  

Surface-Borehole Electric Method in Predicting Oil and Gas in Target Reservoirs in Xia 79 Well Zone in Northwestern Margin of Junggar Basin

作　　者：索孝东 董卫斌 刘振宇[2] 何周[2] 

机构地区：[1]中国石油集团东方地球物理公司综合物化探事业部,河北省涿州市072751 [2]中国石油新疆油田分公司勘探开发研究院,新疆乌鲁木齐市830016

出　　处：《中国石油勘探》2007年第5期46-50,共5页China Petroleum Exploration

摘　　要：准噶尔盆地西北缘夏79井区八道湾组储层非均质性较强、渗透性较差,造成对目标油层的分布范围认识不清,影响了油区的整体开发。通过井—地电法勘探,研究成果表明油气的分布既受构造因素的控制,也受岩性因素的制约,并不是一个整装的含油气区。含油砂体相对发育区表现为视电阻率和双频相位综合参数局部高值异常区(有利的油气聚集部位),泥岩相对发育区表现为局部低值异常区(不利的油气聚集部位),由低值区向高值异常区过渡的鞍形异常区是油气由低部位砂体向高部位砂体运移连接部位(较有利的油气聚集部位)。钻前、钻后油气预测对比统计15口井当中,有13口井钻探成果与预测结果符合,2口井不符合,预测成功率达86.7%。Reservoirs in Badaowan Formation in Xia79 Well zone in northwestern margin of Junggar Basin feature in strong heterogeneity and poor permeability,which result in vague understanding of target reservoirs distribution and have a negative effect on integrated development of oil regions. Exploration using surface-borehole electric method is conducted,which shows that oil and gas distribution is controlled by both structural and lithologic factors.The region where oil bearing sand bodies well developed is high-value anomalous region(favorable for hydrocarbon accumulation)of such comprehensive parameters as apparent resistivity and double-frequency phase.The region where mudstone well developed is low-value anomalous region(unfavorable for hydrocarbon accumulation).Saddle shaped anomalous region where low-value anomalous region transits to high-value one is a connection part that oil and gas migrates from low sand bodies to high ones,which is relatively favorable for hydrocarbon accumulation.Based on comparing the drilling results of 15 wells,the results of 13 wells accord with oil and gas prediction while two do not.Prediction accuracy reaches 86.7%.

关 键 词：井—地电法 视电阻率 双频相位 综合参数 夏79井区 准噶尔盆地 

分 类 号：P631[天文地球—地质矿产勘探]