汤原断陷达连河组生物气储层成藏模式及特征  

Accumulation model and characteristics of biogas reservoirs in the Dalianhe formation in Tangyuan fault depression

作　　者：柯钦 王雷 孟庆岩 王潘 袁立川 程杰 丁朝龙 闫巧洁 KE Qin;WANG Lei;MENG Qingyan;WANG Pan;YUAN Lichuan;CHENG Jie;DING Chaolong;YAN Qiaojie(Geological Research Center,BGP,CNPC, Zhuozhou 072750, China;Daqing No.2 Geophysical Exploration Company of BGP Inc. of CNPC, Songyuan 138000, China)

机构地区：[1]东方地球物理公司研究院地质研究中心,涿州072750 [2]中国石油集团东方地球物理勘探有限责任公司大庆物探二公司,松原138000

出　　处：《物探化探计算技术》2022年第3期302-307,共6页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：汤原断陷达连河组生物气作为非常规油气资源潜力巨大,勘探前景好。利用地震结合钻井,对达连河组生物气成藏模式和特征进行研究。研究表明:①汤原断陷具有郯庐大断裂的区域动力背景,在断陷内部两条北东向断层右行走滑作用下,引起中间地块的左旋运动,最终形成一系列近东西向反S型断层控制的翘倾断块,早期断块受晚期压力改造后形成断背斜,断背斜侧向和顶部被宝泉岭一段泥岩遮挡形成有效圈闭,是生物气的成藏主控因素;②生物气气藏顶面在地震上表现为低频强振幅的“亮点”特征,可利用“甜心体”属性进行预测。综合有效圈闭和生物气气藏地震反射特征,为钻井提供了借鉴。As an unconventional oil and gas resource,biogas in the Dalianhe formation in the Tangyuan fault depression has great potential and good prospects for exploration.Using seismic and drilling data are used to study biogas accumulation model and characteristics in the Dalianhe formation.Results have shown that:(1)the Tangyuan fault depression has the regional dynamic background of the Tanlu fault.Under the action of two northeast-trending faults inside the fault depression,the left-handed movement of the middle block is caused,and a series of near-east-trending anti-S-shaped faults are formed.The tilting block,Early fault blocks were transformed by late pressure to form faulted anticlines,and the lateral and top of faulted anticlines were blocked by mudstone in the first section of Baoquanling to form effective traps,which are the main controlling factors for biogas accumulation;(2)the top surface of the biogas reservoir shows the characteristics of"bright spots"with low frequency and strong amplitude on earthquakes,which can be predicted by the attribute of"sweet body".Comprehensive effective traps and seismic reflection characteristics of biogas reservoirs provide a favorable basis for drilling.

关 键 词：汤原断陷 翘倾断块 生物气 走滑 亮点反射 

分 类 号：P631.4[天文地球—地质矿产勘探]