曲流河末期河道边界识别研究     

窦松江  黄林  孙超囡  冯国杰  张东星 《海洋地质译丛》2014,(1):1-4

以黄骅坳陷明化镇曲流河储集层为例,在稀井网条件下,利用河道边缘检测等地震技术方法,结合沉积规律、生产测井资料,确定河道带展布特征,定量预测未期河道的边界与点坝位置,逐一描述单一河道分布,模拟并展现了整个地质事件连续的分布特征,同时也为井位的优化设计与方案的优化调整奠定了基础.  相似文献   

埕海潜山奥陶系碳酸盐岩储层有利区带预测     

刘娟霞  王莉  曾建宏  李会慎 《海洋地质前沿》2014,30(5):22-26

埕海潜山奥陶系碳酸盐岩储层裂缝十分发育,非均质性强。以地震、钻井、测井和室内分析化验资料研究为基础,深入分析碳酸盐岩储层岩性特征、储集空间特征,明确裂缝性储层发育和分布的控制因素。从叠后地震资料出发,采用地震属性技术和地震反演技术2种地震方法,优选方差体属性、振幅包络属性和频率衰减属性,对埕海潜山奥陶系碳酸盐岩储层的裂缝、孔洞的发育程度和分布进行平面和空间预测,最终结合构造、烃源岩等控制埕海潜山油气成藏的因素,确定碳酸盐岩裂缝型储层的有利区带。  相似文献   

歧口凹陷滨海地区沙一下鲕粒发育特征与重力流沉积     

张伟  柳飒  韩文中 《江苏地质》2014,38(4):599-607

沙一下沉积时期,歧口凹陷板桥斜坡、滨海斜坡和歧北低斜坡滨海地区主要沉积类型为重力流沉积,物源主要来自西部沧县隆起。同时在滨海地区CT16×1等井沙一下部分取样薄片中发现鲕粒的存在。通过对歧口凹陷300余口井沙一下亚段薄片等资料的统计分析,认为滨海地区沙一下层段中的鲕粒为异地鲕粒,其来源主要为板桥斜坡及滨海斜坡,以上地区在沙一下沉积时期虽然仍以陆源碎屑沉积为主,但在某些短时段内,存在＂暖、清、浅＂的区域性欠补偿的高钙清水沉积,发育含鲕粒的碳酸盐岩,形成的原地鲕粒在后期重力流滑塌等事件活动的作用下,沿着滨海、港东断层等输送通道被搬运至滨海地区。通过此次鲕粒来源分析,一方面重新梳理了歧口凹陷两大盆外物源（北部燕山、西部沧县隆起）的波及范围,深化了对歧口凹陷沙一下沉积时期沉积体系的认识;另一方面发展形成了利用地震相、测井相、岩芯相和薄片相＂四相合一＂的沉积体系研究方法。  相似文献   

松南王府地区登娄库组—泉头组一段储层物性及控制因素     

崔桐  董清水  楼仁兴  孙雷  张明杨  李良峰 《世界地质》2014,33(1):129-136

以沉积相研究作为基础对松辽盆地王府地区登娄库组—泉头组一段碎屑岩储层的岩石学、成岩作用、储层物性及控制因素的研究表明:该区目的储层的岩石类型以岩屑长石砂岩和长石砂岩为主,而孔隙类型主要为粒间缩小孔隙和粒内溶蚀孔隙。孔隙结构以Ⅲ级为主,属于低孔-特低孔和特低渗-超低渗砂体。有利沉积相带是控制储层物性高值区分布的内在因素;胶结作用是泉头组一段储层物性衰减的关键因素;压实与胶结作用是登娄库组储层物性衰减的重要因素;溶解作用形成了局部登娄库组2 400~2 600 m次级孔隙高值带。  相似文献   

Numerical modeling of Late Miocene tectonic inversion in the Xihu Sag,East China Sea Shelf Basin,China     

《Journal of Asian Earth Sciences》2014

The East China Sea Shelf Basin is an important oil- and gas-bearing basin in the West Pacific continental margin. This region was affected by subduction of the Pacific Plate and the Philippine Plate in Cenozoic and experienced multi-stage tectonic inversions. This paper presents results from a numerical simulation by finite element method to the Xihu Sag in the East China Sea Shelf Basin and neighboring areas in an attempt to evaluate the WNW-directed compression on the sag during Late Miocene. Based on comprehensive structural analysis of a large number of seismic profiles, we determine the structural geometry of the sag, including the basement of the basin, the sedimentary cover, and 29 major faults in the Xihu Sag. Simulation results show that under continuous WNW-directed compression, tectonic inversion occurred firstly in the Longjing and Yuquan tectonic zones in the sag. Based on quantitative analysis of vertical displacement field of the Xihu Sag and peripheral areas and its stress intensity evolution, we identify a compressional regime in the Longjing Anticline Zone with a gradually propagated uplifting from south to north; whereas the propagation of uplifting in the Yuquan Anticline Zone is from north to south. The inversion intensity decreases from north to south. The formation of the tectonic inversion zone in the Xihu Sag is not only correlated to the direction of compression and fault patterns in the basin, but also closely related to the spatial configuration of fault surfaces of the Xihu–Jilong Fault in the Xihu Sag.  相似文献   

Structural patterns of the late Mesozoic crustal detachment system in the Raoyang Sag,Bohai Bay Basin,eastern China: New insights from 3D seismic data     

《Marine and Petroleum Geology》2017

Understanding the late Mesozoic tectonic origin and structural patterns of the Bohai Bay Basin (BBB) is of growing importance for its buried-hill petroleum exploration. This study revealed, based on 3D seismic and borehole data, that the Raoyang Sag in the Jizhong Depression, western BBB, was dominated by a crustal detachment system during the late Jurassic to the early Cretaceous. It was characterized by the WNW-dipping low-angle detachment fault F₀ (namely Cangxi Fault), the structural dome cored by Archean Basement rocks at the footwall and supradetachment basins on the hanging wall. We suggested the late Mesozoic volcanic materials and coarse deposits accumulated in the supradetachment basins had locally diminished the petroleum prospect, but the syndetachment deformation and denudation had contributed to it by means of promoting petroleum migration from source rocks to reservoirs and improving porosity and permeability of the reservoir rocks by karstification and structural fracturing.  相似文献   

测井多尺度分析方法中最优小波基的选取   总被引：6，自引：0，他引：6  

房文静  范宜仁  邓少贵  李霞 《煤田地质与勘探》2006,34(4):71-73

不同的小波基具有不同的时频特征,用不同的小波基分析同一问题会产生不同的结果。因此,小波基的选取和优化在实际应用中是一个重要问题。本文详细分析了小波基的基本性质,并以相关系数作为选取最优小波基的依据,分别选取4种常用小波基函数进行分析和对比,通过比较相关系数的大小,选定了适合测井多尺度分析方法的最优小波基。对实际测井信号的多尺度加权重构表明,最优小波基的选取是合理的;相关系数法作为选取小波基的一种方法是可行的。   相似文献   

草湖地区侏罗系层序地层及沉积体系特征          下载免费PDF全文

陆金波  王英民  张雷  王改云  顾秀梅 《沉积与特提斯地质》2011,31(1):1-5

基于测录井资料对比,结合区域构造演化特征,将草湖凹陷侏罗系划分为两个三级层序J-SQ1与J-SQ2。J-SQ1时期气候温暖潮湿,层序发育完整的上升半旋回和下降半旋回沉积,发育辫状河体系和湖泊体系;J-SQ2时期气候逐渐转为炎热半干旱,层序发育不完整,只发育上升半旋回沉积,主要由氧化型湖泊体系构成,发育滨浅湖砂滩、泥滩互层沉积。其中,J-SQ1早期辫状河河道砂体叠置厚度大,储层物性好,上覆中厚层湖相泥岩沉积,是本区有利的储集层段。  相似文献   

黄骅坳陷孔南地区孔店期徐西断层构造活动规律研究——来自沉积响应的证据   总被引：1，自引：0，他引：1       下载免费PDF全文

颜照坤  段润梅  李勇 《江苏地质》2011,35(1):1-10

根据地震资料、钻井资料,对黄骅坳陷孔南地区孔店组残留地层进行精细研究,获得对孔店组地层的沉积特征深刻认识,进而分析孔店期徐西断层拉张作用和走滑作用对孔店组沉积的控制作用,并得出徐西断层在孔店期的构造活动规律:孔店期徐西断层的拉张作用和走滑作用同时进行,并且拉张作用和走滑作用均持续增强。  相似文献