歧口凹陷板桥-滨海地区沙二段沉积体系展布特征及成藏效应  

Sedimentary depositional system and hydrocarbon accumulation effect in the 2nd member of the Shahejie Formation of Banqiao-Binhai Area,Qikou Sag

作　　者：郑斯赫 韩国猛[2] 汪晓敏[2] 陈长伟[2] 王锦程[2] 付东立[2] 王旭 ZHENG Sihe;HAN Guomeng;WANG Xiaomin;CHEN Changwei;WANG Jincheng;FU Dongli;WANG Xu(Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu,Sichuan 610059,China;PetroChina Dagang Oilfield Company,Tianjin 300280,China;Shanxi Coal Bed Methane Exploration and Development Branch of CNPC,Changzhi,Shanxi 046000,China)

机构地区：[1]成都理工大学沉积地质研究院,四川成都610059 [2]中国石油大港油田分公司,天津300280 [3]中国石油山西煤层气勘探开发分公司,山西长治046000

出　　处：《东北石油大学学报》2021年第1期11-19,I0001,I0002,共11页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2016ZX05006-005)。

摘　　要：歧口凹陷板桥-滨海地区沙二段碎屑岩沉积体系具有良好的油气勘探前景。基于岩心观察、测录井数据、轻重矿物特征、砂地比统计数据等,分析板桥-滨海地区沙二段沉积体系、物源体系,明确沉积体系展布特征并探讨成藏效应。结果表明:歧口凹陷板桥-滨海地区沙二段沉积期存在沧县隆起、燕山隆起、港西凸起3个物源区,其中沧县隆起和燕山隆起为主要供源区,港西凸起供源能力较弱;研究区沙二段发育辫状河三角洲、扇三角洲及湖泊3种沉积相类型;沧县隆起周缘发育扇三角洲,燕山隆起南部及港西凸起东部发育辫状河三角洲,研究区东部发育湖泊相,是烃源岩发育的有利地区;断层附近沙二段砂体是油气勘探的有利目标,燕山隆起南部大面积辫状河三角洲前缘砂体与湖相泥岩交互发育,为岩性油气藏勘探的有利地区。该结果为歧口凹陷板桥-滨海地区油气勘探提供参考。The clastic sedimentary system of Banqiao-Binhai Area of Qikou Sag holds a good prospect for oil and gas exploration.Based on core observation,logging data,light and heavy mineral characteristics and percentage of sandstone in the layer,the sedimentary system and provenance system of the 2nd member of the Shahejie Formation are analyzed in this paper,the distribution characteristics of the sedimentary system is defined,and the hydrocarbon accumulation effect is discussed,so as to provide references for oil and gas exploration in the study area.The results show that there are three provenance areas during the deposition of the 2nd member of the Shahejie Formation in the study area,namely Cangxian Uplift,Yanshan Uplift and Gangxi Uplift,in which the Cangxian Uplift and Yanshan Uplift are the main provenance areas,however,the source supply capacity of Gangxi Uplift is weak.Braided river delta,fan delta and lake are developed in the 2nd member of the Shahejie Formation in the study area.Fan deltas are developed around Cangxian Uplift,braided river deltas are developed in the south of Yanshan Uplift and north of Gangxi Uplift,and lacustrine facies are developed in the east of the study area,which is a favorable area for the development of source rocks.The sand bodies of 2nd member of the Shahejie Formation near the fault are favorable for oil and gas exploration target,sand bodies of braided river delta front and lake facies mudstone interactively develop in the south of Yanshan Uplift,which is a favorable region of lithologic reservoir exploration.The results provide a reference for oil and gas exploration in Banqiao-Binhai Area of Qikou Sag.

关 键 词：沉积体系 物源体系 成藏效应 沙二段 板桥-滨海地区 歧口凹陷 

分 类 号：TE122.2[石油与天然气工程—油气勘探]