基隆凹陷油气资源潜力

概述了基隆凹陷的地质、含油气概况，并与勘探程度较高的西湖凹陷作了对比，指出基隆凹陷两侧斜坡、台北构造带、安平斜坡及东侧的断阶带为有利的勘探区。     

东海西湖凹陷平湖构造带油气运聚特征

平湖构造带是东海西湖凹陷的一个次级构造单元，是油气勘探的重点区域之一，应用流体包裹体及碳同位素组成等研究了构造带内的油气运聚特征，并与凹陷内的另一个主要油气聚集带－浙东中央背斜带的油气运聚特征进行对比。研究表明，平湖构造带经历了2期油气充注过程，其中第1期主要充注液态烃，第2期主要充注气态烃，充注时间相对较晚，且第1期古地温低于第2期；构造带内油气运移以侧向运移为主，该区是有利于的油气运移指向区。     

东海西湖凹陷油气成藏地质认识

以东海西湖凹陷勘深资料为背景，从盆地演化、地层层序、储集岩、盖层、烃源岩、圈闭等地质因素来深讨东海西湖凹陷油气成藏情况。西湖凹陷的烃源岩主要为泥岩和煤，储集岩主要为始新统平湖组和渐新统花港组的砂岩，基层的泥岩厚度大，连续性好，多种圈闭类型，配置好。总体看来西湖凹显的生、储、盖、圈等油气成藏地质条件好，是东海大陆架油气最丰富的地区。     

Evaluation of 2D models for the prediction of surface depression storage using realistic reference values

Depression storage (DS) is the maximum storage of precipitation and runoff in the soil surface at a given slope. The DS is determined by soil roughness that in agricultural soils is largely affected by tillage. The direct measurement of DS is not straightforward because of the natural permeability of the soil. Therefore, DS has generally been estimated from 2D/3D empirical relationships and numerical algorithms based on roughness indexes and height measurements of the soil surface, respectively. The objective of this work was to evaluate the performance of some 2D models for DS, using direct and reliable measurements of DS in an agricultural soil as reference values. The study was carried out in experimental microplots where DS was measured in six situations resulting from the combination of three types of tillage carried out parallel and perpendicular to the main slope. Those data were used as reference to evaluate four empirical models and a numerical method. Longitudinal altitudinal profiles of the relief were obtained by a laser profilometer. Infiltration measurements were carried out before and after tillage. The DS was largely affected by tillage and its direction. Highest values of DS are found on rougher surfaces mainly when macroforms cut off the dominant slope. The empirical models had a limited performance while the numerical method was the most effective, even so, with an important variability. In addition, a correct hydrological management should take into account that each type of soil tillage affects infiltration rate differently. Copyright © 2016 John Wiley & Sons, Ltd.     

Diagenesis of Paleogene sandstone from Kong 1 Member of Southern Kongdian in Huanghua depression

Huanghua depression is one of the richest areas in petroleum and natural gas in China.The Paleogene mainly consists of sandstone with facies of river,delta,fan delta and littoral-shallow lacustrine.Diagenesis played an important role in the properties of reservoir rocks.Applying X-ray diffraction,on the basis of analyzing many cores and thin sections,the authors studied diagenesis of Paleogene sandstone reservoir rocks in kong1 Menber of southern Kongdian in Huanghua depression.Diagenetic complexity shows that the sandstone in this area underwent compaction,cementation,isolation,recrystallization during the burying of sediments,and the first three compose the major diagenesis.The compaction and cementation led to decreasing porosity,and the solution of unsteady minerals also results in increasing in porosity.     

极端生物降解沥青中8,14- 开环藿烷系列及其地球化学意义

借助色谱- 质谱（GC- MS）和色谱- 质谱- 质谱（GC- MS- MS）分析,对黔南坳陷凯里残余油藏凯棠和洛棉剖面上储层沥青中的烃类组成进行了系统分析,以判断其所遭受生物降解作用的程度,探寻在极端降解原油中是否还存在原生生物标志物,为这类原油的油源研究开拓新的途径和方法。结果表明：凯棠剖面上的储层沥青中尽管仍可检测到较为完整的C19- 30三环萜烷和C27- 35藿烷系列,但C19- 29脱甲基三环萜烷系列和C26- 34 25- 降藿烷系列丰富而完整,甾烷系列中C21- 22低分子量甾烷和重排甾烷优势明显,这一系列特征表明这些沥青遭受了剧烈生物降解作用的改造。但三芳甾类仍保存完好,依据原油生物降解程度的评判标准,判断其生物降解级别介于8~9级之间。洛棉剖面上的储层沥青中藿烷系列基本消失殆尽,三环萜烷系列及其脱甲基产物和25- 降藿烷系列的分布因极端生物降解作用而发生显著变异,某些化合物如C23T、C24T、C23NTE和C28- 29NH成为优势成员;甾烷系列中C21- 22低分子量甾烷占绝对优势,三芳甾类完全消失,据此判断该剖面上沥青的生物降解级别已达到10级或更严重。由于这两个剖面上的沥青遭受了极端生物降解作用的改造,常用的甾、萜类生物标志物完全失去了实用价值。但是,在所分析的这些沥青中都检测到三个系列的C27- 35 8,14- 开环藿烷系列,它们与塔里木盆地塔中地区海相端元油中存在的同类标志物的分布特征相似。正常海相端元油和极端生物降解沥青中同时检测到这三个系列的8,14- 开环藿烷,这一事实表明这类生物标志物在成因上具有原生性,而与生物降解作用无关。此外,在极端生物降解作用沥青中的完好保存,表明它们具有极强的抗生物降解能力,因而它们在此类原油的油源研究中可能具有潜在的实用价值。     

松辽盆地开鲁坳陷西部四方台组铀成矿条件及找矿方向

开鲁坳陷位于松辽盆地西南部,通过系统地分析开鲁坳陷西部铀源、构造、岩性-岩相、砂体氧化-还原、水文地质和铀矿化特征,笔者认为区内四方台组具备砂岩型铀矿成矿的基本地质条件。经统计蚀源区和地层本身砂体铀含量,数据显示该区具备丰富的内外双重铀源。深部还原流体可沿主干断层直接进入四方台组,这些断层也为地下水排泄提供通道。四方台组发育冲积扇、辫状河沉积体系,泥-砂-泥结构稳定,具备良好的地下水补-径-排和水中铀水文地质条件。文章从氧化带、砂体Th/U值变化规律、Fe²⁺/Fe³⁺值及有机碳含量分布特征等方面阐述其与铀成矿的关系。铀成矿主要受铀源、构造、岩性岩相及砂体氧化-还原等关键因素控制,各种成矿要素匹配良好,具备形成中型及以上砂岩型铀成矿潜力。     

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

“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：T₃时期近EW和NW(W)逆断,J₁₊₂继承发育;J₃+K₁初期挤压逆冲形成NNE(近SN)向逆断-转换断层;至K₁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...     

南阳凹陷东庄次凹油气成藏模式分析

正东庄次凹位于南襄盆地南阳凹陷南部地区,研究区的东北部是魏岗鼻状构造,南部和东南部是新野-曲洼断超带,西临凹陷斜坡带,北靠焦店古次凹。东庄次凹砂体沉积连片展布且相对稳定,储集条件良好,邻近油源且油源条件较好,是南阳凹陷增储上产的主要阵地之一。但是该区地层沉积过程中断裂较为发育,各期断层相互切割,     

东营凹陷沙四下亚段砂砾岩致密化过程与油气成藏

正东营凹陷北部陡坡带沙四下亚段砂砾岩中富含油气(刘华,2012),但由于砂砾岩沉积成因复杂,又经历了漫长的成岩演化过程,烃源岩经历了正常原油、凝析油气、湿气多次生烃,多期生烃与致密砂砾岩储层致密化之间形成了复杂的匹配关系,使研究区致密砂砾岩成藏过程复杂化。明确砂砾岩致密化过程及其与油气充注的关系,是正确认识油气藏类型、查清油气成藏控制因素的关键。