塔里木盆地古生界气源岩热演化史研究

利用盆地模拟系统，用镜质体反射率反演法进行了热史的恢复，计算了塔里木盆地寒武系，下奥陶统，中上奥陶统，石炭系等古生界气源岩在不同地质时期的镜质体反射率。建立了塔里木盆地轮南地区，满加尔凹陷，阿瓦提凹陷和塔中地区古生界气源岩的热演化史，着重分析了各地区古生界气原岩的成气贡献，并从演化角度分析了气源岩的生气高峰。     

玛纳斯河流域山前平原地下水资源分析

<正>西北内陆盆地地下水系统的特点是:地表水、地下水相互转化频繁,地表水为地下水的最主要补给源,在自然条件下地下水的主要排泄途径为蒸发和泉水排泄,地下水具有十分重要的生态地质作用。了解这类地区地下水资源的特征,对于该地区地下水的合理开发利用、社会经济的可持续发展以及改     

博格达山前带砂岩孔隙结构分形几何学特征与储层评价

博格达山前带是吐哈盆地北缘紧临博格达山前的北部坳陷带的部分地区，根据分形几何学的基本原理，并依据压泵资料，计算了该地区孔隙结构的分形维数及分形下限，讨论了分形几何学在博格达山前带侏罗系储层评价中的应用 。     

Tectonic types and evolution of Ordovician proto-type basins in the Tarim region

The Ordovician system is an important target for exploration in the Tarim Basin. Restoration of the Ordovician tectono-depositional environment is a key basis for the study of the structural development history in Tarim block and the prediction of the favorable Ordovician reservoir belts （zones）. Based on the surrounding tectonic settings, the litho-facies and sedimentary fill, the palaeo-geography, palaeoclimate and palaeo-ecology, and the structural deformation and magmatic eruptions, in this paper we combine the sedimentary fill in the basin with the development of the surrounding orogenic belts and re-build the proto-type basins of the different Ordovician periods. During the Ordovician period, the Tarim region was characterized by the composite of the interior cratonic depression with the peripheral cratonic depression. The interior cratonic depression in the central and western parts is mainly the deposiUonal area of the platform facies while the peripheral cratonic depression in the eastern part is mainly the zone of deepwater basin facies, with the slope acting as the transition belt between them. During the Late Ordovician period, the closure of the Northern Kunlun Ocean and destruction of the trench-arc-basin system in the Altyn Tagh region put the southern part of the Tarim block under com- pression and uplifting and turned the central and western parts of the carbonate platform into the mixed deposiUonal continental shelf. The eastern region of the basin had the over-compensated flysch sedimentation with huge thickness, marking the drastic turn of the basin nature. The basin tectonic framework turned to the south-north differentiation of the Silurian period from the east-west differentiation of the Ordovician period.     

Fundamental geological elements for the occurrence of Chinese marine oil and gas accumulations

The Paleozoic strata in the Tarim Basin, Sichuan Basin and Ordos Basin are the major targets for marine petroleum exploration, with developed high quality hydrocarbon, mainly argillite. The deep burial of these source rocks suggests that they mainly develop gas instead of oil. But different maturities of organic matter may lead to different hydrocarbon facies. Through thermochemical sulfate reduction （TSR）, the hydrocarbon in the carbonate rocks may undergo a process of pyrolytic cracking and be catalyzed into gases. The marine reservoirs mainly consist of carbonate and clastic rocks, and the former is controlled by sedimentary facies, dolomitization, solution, TSR and cracking. The multiphase tectonic cycling develops multiple source-reservoir-cap combinations and diversified types of traps and reservoirs, featuring multiphase reservoir formation, mainly late-phase formation or consolidation. Palaeo-uplifts play a controlling role in hydrocarbon accumulation. Differences in major source rocks in the three basins lead to different locations of oil-gas accumulation layers, different types and patterns of reservoirs and different features of reservoir formation.     

塔里木盆地石炭-第四纪构造演化与地层组合特征

塔里木盆地石炭-第四纪概括为一次大构造旋回。盆地构造演化可分为4个阶段，即克拉通边缘坳陷、前陆盆地、断陷-坳陷、复合前陆盆地阶段。地层组合明显受构造作用控制，依据该盆地构造、沉积发育特征分出4个构造-地层组合。     

赤峰市平庄—元宝山盆地汉诺坝玄武岩的地球化学特征及其构造背景

对分布于赤峰东部平庄—元宝山盆地的汉诺坝玄武岩进行了岩石学、地球化学研究.结果表明,研究区内火山岩主要岩石类型为玄武岩及少量沉凝灰岩.玄武岩岩石成分较均一,主量元素变化不大,富钛、贫铝,富Na2O,低K2O.玄武岩稀土元素总量低,轻稀土元素富集,铕、铈异常不明显.玄武岩富集大离子亲石元素Rb,Ba,Th,K,Ta和LREE,高场强元素U相对亏损,相容元素Cr,Co,Ni含量较低.本区汉诺坝玄武岩属于拉斑玄武岩系列,火山岩的源区是软流圈上地幔,玄武岩形成于大陆裂谷的拉伸环境,是大陆板块内部稳定构造环境的产物.     

基于证据权模型的宁芜盆地中段玢岩铁矿资源预测

基于证据权模型,对宁芜盆地中段玢岩铁矿进行矿产资源评价.首先,结合研究区的成矿地质背景,提取地层、岩体、构造、物探异常等四大类证据因子.然后,分析各证据因子与铁矿点之间的空间关系,认为大王山旋回火山岩与次火山岩与玢岩铁矿的关系最为密切,是寻找玢岩铁矿的岩石标志,深成侵入体则与铁矿空间上无明显关系,构造、物探异常在空间上与玢岩铁矿也有较大关联.根据计算结果,选取与玢岩铁矿密切相关的大王山旋回火山岩地层、闪长玢岩岩体、各方向(EW,NW,NE)构造缓冲区、航磁异常和布格重力异常七类证据图层.最后,采用证据权模型进行成矿后验概率计算,结合成矿地质背景及物探异常,圈定5个成矿预测区,它们在区域上具明显的NE向展布特征,并且普遍分布与成矿密切相关的闪长玢岩岩体,同时位于航磁高值以及NW向和NE向构造发育密集处.     

温度、压力对莺-琼盆地储层岩石物性影响的实验研究

为探讨温度、压力的变化对储层岩石物性的影响,利用高温高压岩石物性参数测试系统对莺-琼盆地中深层砂岩储层岩样进行了气体介质的变温及高温变围压孔隙度和渗透率测试。实验结果表明,莺-琼盆地储层岩石在高温下的热膨胀会造成岩石的孔隙度和渗透率出现轻微下降,热膨胀效应对孔隙度影响很小(变化率3%),对渗透率的影响相对明显(平均变化率8%),且喉道越小,影响越大。在高温条件下(170℃),压力因素引起孔隙度和渗透率的下降幅度要大于单一温度的影响,岩石孔隙度的变化主要受初始孔隙空间大小及泥质含量的控制,而高温条件对岩石的渗透率降低有抑制作用。实验岩石表现出的温度及压力敏感特性主要受岩石刚性颗粒含量及胶结强度的控制。     

鄂尔多斯盆地长7致密油水平井体积压裂开发效果评价及认识

鄂尔多斯盆地长7致密油水平井衰竭式开发产量递减变化规律可分为3个阶段:一是初期稳产阶段,主要受人工裂缝周围体积压裂未返排液补充能量的影响;二是递减较快阶段,由压裂未返排液能量补充向溶解气驱的转化过程;三是稳定递减阶段,主要受溶解气驱的控制,基本符合双曲递减规律。在这些基本规律认识的基础上,结合现场开发试验效果评价,确定合理的水平井体积压裂衰竭式开发关键技术参数:井距500~600 m,人工裂缝段间距90 m;排量10~12 m3/min,单段入地液量和加砂量分别约为1 100和100 m3;生产流压在初期稳产阶段略大于饱和压力,递减较快阶段略低于饱和压力,稳定递减阶段保持不低于饱和压力的2/3;致密油示范区水平井初期单井产量达到周围定向井的8~10倍;年累积产量达到同样面积直井的1.4~1.8倍,取得了较好的实施效果。