黄骅坳陷断裂发育特征及其对新生古储型潜山成藏控制作用  

Fault characteristics and fault control of hydrocarbon accumulation in“new source,old reservoir”type buried hills of the Huanghua depression

作　　者：金凤鸣[1] 张飞鹏 韩国猛[1] 蒲秀刚[1] 王华[2] 付立新[1] 李宏军[1] 楼达[1] 程鑫 孙沛沛 JIN Fengming;ZHANG Feipeng;HAN Guomeng;PU Xiugang;WANG Hua;FU Lixin;LI Hongjun;LOU Da;CHENG Xin;SUN Peipei(PetroChina Dagang Oilfield Company,Tianjin 300280,China;School of Earth Resources,China University of Geosciences(Wuhan),Wuhan 430074,China;Tianjin Branch of CNOOC Ltd,Tianjin 300459,China;School of Geosciences,China University of Petroluem(East China),Qingdao 266580,China)

机构地区：[1]中国石油大港油田分公司,天津300280 [2]中国地质大学(武汉)资源学院,湖北武汉430074 [3]中海石油(中国)有限公司天津分公司,天津300459 [4]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《地学前缘》2023年第1期55-68,共14页Earth Science Frontiers

基　　金：国家自然科学基金项目(41972117)。

摘　　要：“新生古储”型潜山是大港油田潜山勘探的重要领域并取得了勘探突破,多期断裂演化控制了新生古储潜山类型多样性及成藏条件多样性。通过系统分析坳陷控山断裂的静态、动态特征,恢复断裂发育对潜山山系形成的控制作用,针对古生界内幕碳酸盐岩与碎屑岩储层物性特征和成储机制、烃源岩特征及源-储配置关系等成藏要素系统分析,区划潜山类型,指出不同类型潜山勘探潜力层系及分布区。研究结果表明:(1)现今断裂具有多走向、多性质的特征,受控于多期次叠合演化的结果。其主要为四个期次:T_(3)时期近EW和NW(W)逆断,J_(1+2)继承发育;J_(3)+K_(1)初期挤压逆冲形成NNE(近SN)向逆断-转换断层;至K_(1)为负反转发育阶段,形成负反转断层;E时期受伸展作用控制,形成NE(E)向伸展断层。(2)“两期挤压成山-一期块断成山”成山过程,内幕储层经历“早成岩期—表生期—中成岩期—晚成岩期”多期成岩作用,奥陶系碳酸盐储层为中孔-中渗储层,碎屑岩储层为中-低孔隙、中-低渗储层。(3)在孔二段和沙三段优质烃源岩发育的条件下,源-储对接关系成为潜山成藏的重要控制因素,受断裂控制形成五种源-储对接类型。(4)“以烃源岩为主线,源-储对接为依据,内幕构造样式为辅”,将新生古储潜山划分为3大类、7小类,其平面呈环带展布特征;潜力勘探区包括盆地多期构造叠合区奥陶系层系、盆缘中低位层系和盆外高位潜山源岩对接的深部层系等三个区带。The“new source,old reservoir”type buried hills are an important exploration target in the Dagang Oilfield,Hunanghua depression where an exploration breakthrough is made recently.Controlled by multi-stage fault evolution this type of buried hills is diverse in reservoir types and hydrocarbon accumulation conditions.In this study,the static and dynamic characteristics of the hill-controlling faults are systematically analyzed,and the fault control on the formation of buried-hill reservoirs is revealed.Based on a systematic analysis of the influencing factors in reservoir formation,such as physical properties/reservoir-forming mechanisms of Paleozoic carbonate and clastic reservoirs,source-rock properties,and source-reservoir configurations,the buried-hill types are delineated,and the potential exploration strata and distribution area for each type are identified.Results show(1)the current fault system has the multi-direction,multi-property characteristics resulted by multi-stage superposition evolution.The fault system develops through four main stages:near-EW and NW(W)reverse faults of T3 period continue development in J_(1+2);NNE(near-SN)thrust-transition fault forms by extrusion thrust in J_(3)+K_(1);the above thrust-transition fault undergoes negative inversion in K_(1);and NE(E)extension fault forms in the Cenozoic E period.(2)The buried hill experienced“two-stage extrusion,one-stage block faulting”orogenesis,and the inner reservoir experienced multi-stage diagenesis(early-,supergene,middle-and late-diagenesis).The Ordovician carbonate reservoir has medium porosity/permeability,and the clastic reservoir has medium-low porosity/permeability.(3)With high-quality source-rock developing respectively in the 2^(nd) and 3^(rd) members of the Kongdian and Shahejie formations,source-reservoir configuration becomes an important factor controlling the formation of buried-hill reservoirs,and five source-reservoir configuration types are formed under fault control.(4)According to source-rock property,source-reservo

关 键 词：断裂特征 演化过程 成储机制 源-储关系 潜山类型区划 黄骅坳陷 

分 类 号：P618.130.2[天文地球—矿床学] P542[天文地球—地质学]