用不稳定测试资料确定均质气藏气井产能

以多产量下均质气藏不稳定压降方程通式为基础 ,提出了不稳定产能方程和全新的产能分析方法 .为了保证各产量段分析结果的一致性和可靠性 ,建立了均质气藏不稳定产能方程的最优化数学模型 .从测试的角度来说明该方法不需要关井恢复压力 ,产能分析结果受地层压力的精确程度影响较小 .对长庆气田实际资料的处理表明 ,运用该方法能有效地处理实际资料 ,提高测试资料的利用率 ;进行产能测试设计 ,可以显著地节省测试成本 ,提高气田经济效益     

西柳油田10断块油藏动态监测新技术

利用色谱特征指纹进行油藏流体、动态地球化学监测技术,不仅可实现混采单层贡献率的大面积、定时在线监测,从而确定地下流体的运动规律和产能变化,并且可进一步分析井间连通性的剩余油分布规律.该技术测试快速、准确、费用低.     

神经网络在储层参数描述中的应用

神经网络是生物神经系统的一种高度简化的计算机模式，已应用于许多领域，包括模式识别、分类和信号处理。文章研究了神经网络应用于石油勘探中储层参数描述的可能性。结果表明，神经网络对储层参数的描述提供了一种简单而又很有潜力、非常有用的工具。     

隐蔽油藏保存条件研究

影响油藏保存的地质因素主要包括风化剥蚀、差异性抬升和断裂活动.构造油藏由于区域性整体抬升,导致盖层的风化剥蚀,降低了油气的封盖能力.地层油藏的储层和盖层发生了一定程度的倾斜后,相当于其上覆盖层厚度增大,相同的剥蚀量对地层油藏的破坏程度小于构造油藏.岩性透镜体和上倾尖灭油藏多为自生自储型岩性油藏,往往发育在较深的部位,四周被生油岩所包裹,受到构造抬升而遭受剥蚀的程度更弱.对隐蔽油藏而言,差异升降只是造成油藏产状的变化,其中的油气没有因为差异升降而受到破坏.对于构造油藏而言,油气藏形成后,由于差异升降区域倾斜,油气沿抬升了的溢出点外溢,容易造成油藏的破坏.断裂活动可破坏盖层的连续性与完整性,进而影响油藏的保存.当断裂作用只是在一个油藏内部发生,可以使得油气由下部油层向上散失,结果造成油气由一个油层分为多个油层含油.由于岩性油藏大多发育在构造活动较弱的部位,深大断裂一般不发育,断裂活动不会影响到隐蔽油藏的保存.因此,从总体上讲隐蔽油藏的保存条件优于构造油藏.     

应用模拟退火方法优化油藏分布参数的变差函数模型

分析了油藏分布参数具有直接可利用的信息点少、信息点分布不规则,可间接利用的资料多的特点,在应用传统的变差函数模型拟合方法时存在的不足,提出了改进拟合变差函数模型的两种方法;基于直接应用信息控制点建立目标函数和增加油藏多种信息及油藏控制模型约束条件建立目标函数优化变差函数模型的模拟退火方法.以实际的例子证明直接使用信息点约束建立目标函数优化变差函数模型的可行性.     

全新体制下高校图书馆的流通服务——以浙江万里学院图书馆为例

文章分析了高校体制改革新模式下图书馆流通服务的特点、图书馆员的素质要求,指出了管理模式的创新、工作人员综合素质的提高和服务意识的转变是发挥图书馆流通读者服务功能的前提。     

三峡库区移民迁建学校课外体育锻炼调查研究

对三峡库区移民迁建学校课外体育锻炼的开展情况,课外锻炼开展的内容、形式及存在的问题进行调查,提出了三峡库区移民迁建学校有效开展课外体育锻炼的措施.     

Control of coupling among three major factors for formation of high-efficiency gas reservoir——A case study on the oolitic beach gas reservoir in Feixianguan Formation in the northeast Sichuan Basin

Through a case study of the high-efficiency gas reservoir in Feixianguan Formation in the northeast Sichuan Basin, quantitative and semi-quantitative analyses of key elements such as hydrocarbon generation, migration and accumulation, and reservoir evolution as well as their interplay in the critical moment of reservoir formation controlled by the energy field were carried out, by means of numerical modeling of the energy field. It was found that the climax time for Permian hydrocarbon generation was Late Triassic-Early Jurassic and accumulation of oil and gas has resulted in large-scale paleoreservoirs in paleostructural traps in Feixianguan Formation, a process facilitated by fractures connecting the sources. The paleoreservoirs have been turned into high-efficiency gas kitchens due to pyrolysis, which resulted from deep burial at a temperature of 170―210 ℃ as induced by tremendously thick sedimentation in the foreland basin of Daba Mountain in Late Jurassic-Cretaceous period. Meanwhile, abundant acid gas like H2S produced from thermo-chemical sulfate reduction (TSR) at high temperatures leads to extensive dissolution of dolostone in the paleoreservoirs, which may in turn result in modification of the reservoirs and preservation of the reservoir rock porosity. The present distribution of gas reservoirs was ultimately determined in the processes of adjustment, cooling and decompression of the paleoreservoirs resulting from intense deformation in the front of Daba Mountain during the Himalayan orogeny.     

曲线重构反演在火成岩储层预测中的应用

苏北盆地海安凹陷四灶地区阜宁组火成岩发育,但火成岩分布复杂,地震资料品质较差,声波时差曲线对火成岩及其变质带和碎屑岩的反映不明显,火成岩储层预测难度大.针对研究区的特点选取了曲线重构反演来预测火成岩储层.通过对研究区多口井测井曲线的统计分析,优选出能够有效区分火成岩与碎屑岩的GR曲线进行重构,利用GR曲线重构建立的拟阻抗初始约束模型与实际地质规律的吻合程度明显高于用原始曲线建立的模型,GR反演成果所描述的火成岩分布特征与实际的地质分析和认识吻合也较好,说明曲线重构技术在本次反演中起了积极而有效的作用.利用该反演结果,结合目标区的地质认识和实际钻井、测井资料,对火成岩储集层进行了综合描述,描述8个火成岩控制的圈闭,预测6个新圈闭.     

Major factors controllin8 the formation of middle and large marine carbonate stratigraphic fields

Marine carbonate oil and gas fields have become an important exploration area in China and even across the world. Their formation, distribution and enrichment are special owing to the complexity of the deposition, diagenesis and accumulation, which is caused by the multiplicity of the carbonate de- positional environments and facies, huge extensions of formation time and burial depth, complication of diagenetic evolution, heterogeneity as well as the development of pores, caves and fractures affected by various factors. Oil and gas accumulations in carbonate rocks are not strictly controlled by the second-order structure belt. Most of them, under certain structural settings, are controlled by sedimentary diagenesis and its favorable facies. The hydrocarbon reservoir type is predominantly stratigraphic. Based on the worldwide researches of carbonate fields, the paper concludes that 7 main factors control the formation and distribution of middle-large marine carbonate stratigraphic fields.