深水朵体沉积构型及其油气勘探意义  

Sedimentary Architecture of Submarine Lobe and Its Implications on Petroleum Prospecting

作　　者：李磊[1] 李彬 王英民[3] 

机构地区：[1]西安石油大学油气资源学院,陕西西安710065 [2]中国石油长城钻探工程有限公司测井公司,辽宁盘锦124011 [3]中国石油大学地球科学学院,北京102249

出　　处：《山东科技大学学报（自然科学版）》2012年第4期37-43,共7页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家重点基础研究发展计划("973"计划)项目(2009CB219407)

摘　　要：基于地震、测井、岩心及露头等资料,研究了深水朵体的外部形态、内部结构、物理性质及成因。取得3个方面的认识:①深水朵体受陆坡地形及物源供给的影响,发育单一朵体和多级朵体。受沉积厚度、岩性及地震分辨率的影响,孟加拉湾和尼日尔三角洲发育的朵体在地震上呈强振幅丘状反射,内部见分支水道或底超现象;白云凹陷发育的朵体在地震上呈强振幅平行亚平行反射。②深水朵体可划分为小层和层组、朵体单元、朵体以及朵体复合体4个级次。③深水朵体可进一步划分为近端朵体和远端朵体,近端朵体由分支水道复合席状砂组成,叠置的朵体单元构成的远端朵体主要由层状席状砂组成。Based on seismic data, drilling, logging and outcrop, the sedimentary architectures of the submarine lobes are discussed and three conclusions have been made： ODue to the differences in gravity flow supply and continental slope topography, single lobe and multiple-level lobe were formed. Submarine lobes in bay of Bengalare and Niger delta are characterized by high amplitude, mound configuration, lobes in Baiyun sag show high amplitude, parallel and sub-parallel seismic reflection characters; （1）Submarine lobe depositional elements are identified at four scales： bed or bed sets, lobe element, lobe, and lobe complex;（3）Submarine lobe can be divided into proximal lobe and distal lobe. The proximal lobe is formed by amalgamate sheet sandstones within distributary channels, and the distal lobe consisting of overlay lobe elements is mainly composed of layered sheet sandstones.

关 键 词：深水朵体 沉积构型 地震正演模拟 

分 类 号：P618.13[天文地球—矿床学]