秦岭—大别造山带南侧兴山地区中上寒武统白云岩储层特征

秦岭—大别造山带南侧兴山地区中上寒武统白云岩储层较为发育.在野外露头剖面测量的基础上,结合常规薄片鉴定、扫描电镜、图像分析、物性分析等测试手段,认为该区中上寒武统白云岩有效储层主要为泥粉晶云岩、颗粒云岩和细晶—中晶云岩等.泥粉晶云岩的有效储集空间以晶间孔为主;颗粒云岩主要包括鲕粒云岩、砂屑云岩和砾屑云岩等,有效储集空间主要包括粒间孔和粒内溶孔;细晶—中晶云岩非选择性溶孔和晶间孔较为发育.储层的形成与演化主要受到沉积作用和成岩作用的共同影响.其中沉积作用是储层形成的基础,决定了储层的空间展布特征.尽管平坦的沉积底形以及频繁的相对海平面变化导致储层多呈薄层状,但储层厚度较大,而且白云石化和埋藏阶段的选择性溶蚀使得颗粒云岩以及细晶—中晶云岩孔隙度变高,连通性变好,成为中上寒武统较好储层.     

湖南石门地区中上寒武统成岩作用及储层特征

湖南石门地区中上寒武统为一套浅海碳酸盐岩沉积,以局限台地潮坪沉积力主,其次为浅滩沉积.在薄片观察的基础上,使用阴极发光显微镜、电子探针、X衍射分析、和碳/氧同位素分析资料,研究了该区碳酸盐岩的主要成岩作用类型,如胶结作用、白云石化作用、溶解作用等.恢复和建立了该区碳酸盐岩的成岩环境和孔隙演化历史,对该区的储层特征进行评价,认为最好的储层为结晶白云岩型储集层.     

湖南石门地区中上寒武统成岩作用及储层特征

湖南石门地区中上寒武统为一套浅海碳酸盐岩沉积,以局限台地潮坪沉积力主,其次为浅滩沉积.在薄片观察的基础上,使用阴极发光显微镜、电子探针、X衍射分析、和碳/氧同位素分析资料,研究了该区碳酸盐岩的主要成岩作用类型,如胶结作用、白云石化作用、溶解作用等.恢复和建立了该区碳酸盐岩的成岩环境和孔隙演化历史,对该区的储层特征进行评价,认为最好的储层为结晶白云岩型储集层.     

冀中地区湖相碳酸盐岩成岩作用与油气储集关系

在冀中地区的任丘、河间、饶阳一带,通过广泛地勘探,发现下第三系沙河街组内,有一组厚度不等的碳酸盐岩。岩层厚度薄,岩性变化大,在钻探过程中见到不同程度的油、气显示,在试油过程中,出现了百吨以上的高产油井。通过对各井淡水碳酸盐岩的岩心、岩屑进行染色薄片和铸体薄片的鉴定和成岩主要标志(如重力胶结,淡水方解石胶结,渗滤粉砂和早期溶解作用等)的研究,同时考虑沉积环境和古地貌背景,认识到本区湖相碳酸盐岩作用与油、气储集和分布有密切的关系。     

低渗透砂岩储层成岩作用研究及有利储集区预测

做为砂岩储层建模重要方法之一的"相控建模"法的基础是有利储集相带的预测研究,应在沉积微相研究的基础上结合成岩作用研究来确定.低渗透砂岩储层经历复杂的成岩作用,对有利储集相带的分布有较强的控制作用.本文以渤南油田三区沙三段低渗透砂岩储层为例,介绍了低渗透砂岩储层成岩作用研究的思路与方法,并划分了三类成岩-储集相,指出有利储集相带,为相控建模奠定了基础.     

南堡凹陷碳酸盐岩储集性能测井评价研究

针对南堡凹陷潜山碳酸盐岩勘探开发需求,基于基质孔隙和裂缝发育情况进行储集类型识别.利用横波和斯通利波测井资料分析储层有效性,快慢横波最大最小正交能量差较大时,斯通利波出现"V"字型干涉条纹,反射特征明显.基于总孔隙度、裂缝孔隙度、流体移动指数等测井成果信息构建综合判别指标,经自然产能刻度后实现对储集性能的定量评价,初步...     

湖北南漳地区嘉陵江组碳酸盐岩储层成岩作用

湖北南漳地区下三叠统嘉陵江组为一套碳酸盐岩沉积，可分为台地边缘浅滩相、开阔台地相、局限台地相和蒸发台地相等４种不同的相带。该区碳酸盐岩成岩历史复杂，成岩作用类型多样，其中以白云石化、胶结作用、破裂作用和溶解作用最为重要。该区内不同相带的沉积物所经历的成岩环境存在着明显的差别，因而其孔隙演化历史也各不同。其中以局限台地相云坪亚相的碳酸盐岩储集物性最好，其次为蒸发台地相，而台地边缘浅滩相的碳酸盐岩储集     

新立油田扶杨油层成岩储集相研究

以沉积相研究为基础,利用岩心系统观察及各类薄片鉴定、x-衍射、阴极发光、扫描电镜及电子探针能谱、图像分析、压汞曲线等实验分析测试资料,对新立油田扶杨油层成岩作用类型进行研究,并实现了定量评价;综合研究确定研究区主要发育4类成岩储集相类型,即:不稳定组分溶蚀次生孔隙成岩储集相、中等压实弱-中胶结混合孔隙成岩储集相、强压实中等胶结残余粒间孔成岩储集相、碳酸盐强胶成岩储集相,其中不稳定组分溶蚀次生孔隙成岩储集相为最有利于油气储集的成岩储集相类型.     

碳酸盐岩深埋藏溶蚀成岩过程的实验模拟研究

选择乙酸溶液为介质，对白云岩、云灰岩和膏斑云岩进行了不同温压条件下 的溶蚀实验，，以获得的大量实验分析结果为基础，探讨了埋藏条件下碳酸盐岩的溶蚀机理，以及温压、岩石的组成和水介质性质等因素对碳酸盐岩溶蚀作用的影响。研究了膏斑云岩中ＣａＳＯ４的溶蚀习性，以及深埋藏条件下大量溶解状态ＣａＳＯ４的存在对白云溶解所产生的显著抑制作用，实验证实了深埋藏环境对白云溶蚀、孔隙的形成与保有利，因而提出在碳酸直 地     

苏南西部石炭系碳酸盐岩成岩演化与储集特征

苏南西部地区石炭系广泛发育有一套多滩(岛)浅陆表海(台地)潮上带至潮下带沉积的碳酸盐岩,层位齐全。根据岩石的沉积特征,划分为十种岩相。结合岩石成岩作用探讨了孔隙演化,并在现今储集特征分析的基础上,进行了潜在储层预测。     

中扬子地区海相碳酸盐岩储层类型和特征

中扬子地区上震旦统至中三叠统主要为一套海相碳酸盐岩沉积，厚度６０００～１００００ｍ。本文在沉积学和成岩作用研究的基础上，利用大量地面和井下资料，论述了中扬子地区海相碳酸盐岩储集岩类、储集空间类型、储集空间组合特征和储层类型，探讨了控制本区储层发育的主要因素，如胶结作用、白云石化作用、溶解作用和充填作用等，最后对区内各储集层段进行了评价。     

轮南下奥陶统碳酸盐岩储层类型与测井响应

轮南地区下奥陶统碳酸盐岩主要的油气储集空间为裂缝、溶洞及晶间孔,组成裂缝型、裂缝—溶洞型及孔缝型3类储集岩层。不同的储集空间及不同类型的储层具有明显不同的测井响应特征。本文在综合钻井、取心资料及室内分析,测井资料的基础上,建立了区内碳酸盐岩储层识别与划分的标准,并对Ln1,Ln8井进行了储层划分与评价。     

疏水缔合水溶性聚丙烯酰胺的溶液结构的研究

应用流变学方法及扫描电镜,环境扫描电镜手段对疏水缔合聚烯酰胺和传统的超高分子量部分的水解聚丙烯酰胺进行了对比研究。结果表明,在相同浓度的条件下,前者的增粘能力远大于后者。其原因在于前者通过疏水缔合作用在溶液中形成了三维网络状结构。在不同浓度和不同放大倍数的条件下观察到的溶液结构具有一定的自相似性,说明该疏水缔合水溶必聚合物的溶液结构具有一定的分形特性。     

沈阳油田东胜堡变质岩潜山油藏渗流特征研究

通过大量的室内模拟实验资料．对沈阳油田东胜堡变质岩潜山油藏的各项渗流特征进行了较为系统地分析研究，得出该类油藏油气水渗流以裂缝孔隙为主，并具双孔隙特点；在注水开发中，应主要考虑裂缝非均质较强的影响．以防止油藏过早水淹和水沿大裂缝突窜，造成含水上升速度快，驱油效率低的后果。     

UNRAVELLING THE COMPLEXITY OF THIN (SUB-SEISMIC) HETEROGENEOUS CARBONATE RESERVOIRS: AN INTEGRATED STUDY OF THE ALBIAN MAUDDUD FORMATION IN THE GREATER BURGAN AREA,KUWAIT

The Albian Mauddud Formation is a prolific reservoir in Kuwait and nearby countries such as Iraq and Iran but has received far less attention than the under- and overlying units (the Aptian Shu'aiba and Cenomanian Mishrif Formations). Detailed reservoir characterization studies of the formation are required to support field development and improved / enhanced oil recovery (EOR) programmes. In this study, 26 wells penetrating the Mauddud Formation within the Greater Burgan area of Kuwait (Burgan and neighbouring fields) were investigated, integrating the logging of 910 ft of core with petrographic investigations of 113 stained and impregnated thin sections. In the Greater Burgan area, the Mauddud Formation can be divided into a lower Clastic Member and an upper Carbonate Member which is the main focus of this paper. The primary objective of the study was to present a new characterization of this thin, heterogeneous carbonate reservoir by integrating facies analysis and sequence stratigraphy with a detailed petrographic investigation. A second objective was to identify the relative importance of depositional characteristics and diagenesis on the distribution of reservoir properties. Sandstones in the Clastic Member of the Mauddud Formation were deposited on a delta which passed laterally to the north and east into a carbonate platform. During subsequent regional flooding, increased carbonate production resulted in the development of a larger-scale carbonate platform covering the entire study area. The Burgan field area was part of the proximal zone of this carbonate platform. A number of depositional environments were identified by integrating core and thin section data. These range from outer platform to mid- and inner platform, the latter including both high- and low-energy settings (shoal, shoreline; and lagoonal respectively). Mud-supported textures characteristic of low-energy inner-platform and mid- to outer-platform settings are volumetrically dominant in the Mauddud Carbonate Member. Sequence stratigraphic analysis suggests that the Mauddud Carbonate Member is part of a major regressive phase (or highstand systems tract) of a third-order sequence, with the regional-scale K110 MFS positioned close to the transition with the underlying Clastic Member. Two 4^th order transgressive – regressive (TR) cycles or sequences, M1 and M2, were identified within the Carbonate Member. The top-Mauddud surface corresponds to a sequence boundary with long-lasting subaerial exposure during the latest Albian and is characterized by both micro- and macroscopic karst features (calcite dissolution vugs and recrystallization in thin sections; and cavities in cores). This study demonstrates that the Burgan field area experienced significant uplift, with increased differential erosion and/or non-deposition of the upper M2 TR cycle towards the southwest. Eogenetic marine and meteoric calcite cements partially fill macropores close to the tops of the TR cycles and remaining macropores were occluded by shallow-burial calcite cements. Cementation by ferroan dolomite cement, which resulted from the increased overburden and associated chemical compaction, has almost entirely occluded residual macropores in the lower part of the Mauddud Carbonate Member, close to the underlying siliciclastic deposits of the Clastic Member. As a consequence, porosity is mostly preserved in the middle part of the Carbonate Member. The predominance of mud-supported textures in these intervals together with the effects of diagenesis explain the widespread occurrence of microporosity within both micritic matrix and grains. In the Greater Burgan area, meteoric diagenesis associated with subaerial exposure(s) of the top-Mauddud preserved and/or enhanced micrite microporosity. Plug porosity may reach 35% or more, but permeability does not exceed 100 mD. The Mauddud Carbonate Member in the Greater Burgan area is a thin, microporous reservoir, with a dual porosity component which is linked to karst alteration and not to tectonic fracturing. The distribution of reservoir properties results from a combination of primary depositional characteristics and a multiphase diagenetic overprint. This study will guide the future development of the Mauddud reservoir in the Greater Burgan area. It also demonstrates the importance of an integrated approach to constrain sub-seismic heterogeneities in carbonate reservoirs.     

和田河气田奥陶系底水气藏水侵机理研究

塔里木盆地和田河气田奥陶系底水气藏为裂缝性碳酸盐岩气藏，地质研究表明，该气藏水侵的主要方式为水锥型。为了分析该气藏底水上升规律，给开发方案设计提供科学依据，决定利用单井剖面模型对水锥机理进行研究。在分析其主要地质特征的基础上建立了单井剖面模型，采用数值模拟技术研究不同水体大小、不同有效厚度、不同射开厚度、不同非渗透层、不同地层渗透率、不同生产压差以及水平井技术对底水锥进的影响。结果发现，水体大小等因素都对底水锥进产生不同程度的影响，水平井则可以把“底水锥进”演变为“底水推进”。通过机理研究基本搞清了气藏底水运动规律，得出了防止和控制底水上升的措施。据此，建议气藏开发时采用水平井技术，气井部署在储层有效厚度大、平面渗透率较高、垂向渗透率较低的区域，射孔时应有一定的避射厚度，生产时要注意控制生产压差。     

SNPX(DN)-9010盐酸液体系可提高碳酸盐岩地层油井产量

俄罗斯针对阿尔兰油田的构造严重非均质、低渗透和原油高粘度的碳酸盐岩油藏，用常规酸处理效果不断下降的情况，研制成功了一种SNPX(DN)—9010盐酸酸化液，并已成功地将其用于阿尔兰石油公司的碳酸盐岩地层油井的增产处理，见到了明显的增油效果。