油气差异泵吸作用机理探讨——以泌阳凹陷为例

通过对泌阳凹陷油气成藏过程的系统研究,发现在差异抬升过程中,深凹源岩区抬升幅度小,凹陷四周圈闭发育区抬升幅度大,差异抬升运动导致源岩和圈闭之间的势能差急剧增大,从而促使油气大规模沿砂体向圈闭充注,这一过程类似于水泵抽水的过程,据此,文中提出了油气泵吸作用和油气差异泵吸作用的概念及机理,并以泌阳凹陷为例讨论了油气差异泵吸作用的形成条件、主要影响因素及油气差异泵吸作用对油气差异分布的控制作用。研究表明:影响油气差异泵吸作用的因素主要有势能梯度、通道质量和泵源配置及油气运移距离;泌阳凹陷油气分布总体上受成藏运聚系统的控制,在各运聚系统内油气分布受油气差异泵吸作用的控制,其中势能梯度、泵源配置及油气运移距离是影响油气差异分布的主要因素,而在每一个大泵(复合泵)内部,通道质量差异是影响油气差异分布的主要因素。     

Discussion on the feature of strong earthquake: Orderly distribution in time, space and intensity before the Western Kunlun Mountain Pass M=8.1 earthquake

Introduction The Western Kunlun Mountain Pass M=8.1 earthquake occurred on November 14, 2001 is the other M=8 earthquake occurred 50 years after Dangxiong, Tibet M=8.0 earthquake in Chinese mainland. The earthquake has caused the attention of the seismologists in the following aspects: 1) The fracture length is more than 400 km, which is far away from the estimated length by the statistic empirical function between the magnitude and the fracture length (WANG, et al, 2002); 2) The aftersh…     

Seismicity anomalies before the great earthquake of M_S=8.1 in the Kunlun Pass and its significance to earthquake prediction

Introduction The MS=8.1 earthquake occurred in west of the Kunlun Pass on November 14, 2001. It is the greatest earthquake occurred in China since the last half of the century and is an important event in recent seismic history of China. Some specialists consider that the earthquake occurred in the area where the earthquake monitoring capability is lowest in Chinese mainland; no striking precursory seismicity was found. The study on the precursory seismicity before the earthquake has not b…     

3-D rheologic model of earthquake preparation (I)—Displacement field

Introduction The rock medium shows mainly elastic character under low-temperature, low-pressure and external force for short duration, yet it shows rheologic property under high-temperature, high-pressure and long-time external force. It is reasonable that the rapid earthquake generating process lasted for tens seconds is analyzed by the elastic theory. As for the earthquake generating process for hundreds or thousand years, nevertheless, the rheologic property of rock must be taken into accou…     

略阳煎茶岭铜镍硫化物矿床Re—Os同位素年龄及其地质意义

采用矿石Re-Os同位素方法对陕西省煎茶岭硫化镍矿床矿石进行了成矿年代学研究,获得了878士27 Ma(1σ)的等时线年龄,首次厘定了该矿床成矿时代为新元古代,成岩成矿基本同时.通过对878 Ma硫化镍矿石初始Re-Os同位素体系的γOs计算和Re/Os值分析表明,其yOs和Re/Os值变化范围大,深部条带状矿石的Re/Os值仅为0.05,yOs为-6.70;块状矿石的Re/Os值范围为4.24～24.43,γOs为-15.37～+280.65,说明成矿过程中有壳源物质的混染;两件样品的γOs为负值(-15.37,-6.70),可能指示其超镁铁质岩浆来源于Re亏损地幔.煎茶岭超基性岩体年龄及其镍矿石的Re-Os等时线年龄与扬子克拉通北缘火山岩浆活动时间相对应,它们是扬子克拉通西北缘晋宁期构造岩浆成矿作用的产物.     

2001年11月14日昆仑山口西8.1级地震前地震活动性异常及其思考s

2001年11月14日在昆仑山口西发生了8.1级地震，震中位置为90.9E、36.2N．分析表明，8.1级地震前一些主要地震活动性异常都出现了，例如空区、条带、增强、平静和震群等，且与7级大震比较，这些前兆图象的演变具有类似的过程，所不同的是8.1级地震的前兆地震活动图象涉及的区域范围更大、地震震级更高，这为特大地震的前兆识别和预报提供了依据．最后回顾了对这次大震的粗略预测，并讨论了有关大震预测的某些问题．      

中国地震台网数字化改造的进展

介绍了九五期间（1996~2000年）中国地震台网数字化改造的进展和首都圈数字地震台网（1999~2001年）的建设情况，重点介绍了国家数字地震台网、区域数字地震台网和流动数字地震台网的台站分布、仪器配备和主要任务．      

地震前地表重力场变化的一种可能解释——应力-损伤耦合效应

文中运用损伤力学研究方法 ,提出孕震过程中引起地壳破坏的应力 -损伤耦合效应。利用应变等效性假设 ,推导了地壳体的应力 -损伤耦合效应与地表重力变化之间的理论关系。根据岩石力学实验的不同加载途径 ,模拟了 1976年唐山 7 8级地震和 2 0 0 1年昆仑山口西 8 1级地震重力演化的不同特征 ,结果与实际情况符合较好 ,表明应力 -损伤耦合效应可以作为地震前地壳重力变化的一种物理解释     

Adjoint Matching Condition for Parameterized Discontinuities—A Derivation Using Lagrangian-form Costfunction

ＡｄｊｏｉｎｔＭａｔｃｈｉｎｇＣｏｎｄｉｔｉｏｎｆｏｒＰａｒａｍｅｔｅｒｉｚｅｄＤｉｓｃｏｎｔｉｎｕｉｔｉｅｓ—ＡＤｅｒｉｖａｔｉｏｎＵｓｉｎｇＬａｇｒａｎｇｉａｎ－ｆｏｒｍＣｏｓｔｆｕｎｃｔｉｏｎＸｕＱｉｎ（许秦）ＣｏｏｐｅｒａｔｉｖｅＩｎｓｔｉｔ...     

Analysis and study of the large earthquake risk in Yanqing-Huailai basin

ＡｎａｌｙｓｉｓａｎｄｓｔｕｄｙｏｆｔｈｅｌａｒｇｅｅａｒｔｈｑｕａｋｅｒｉｓｋｉｎＹａｎｑｉｎｇＨｕａｉｌａｉｂａｓｉｎＣＨＡＮＧＱＵＡＮＬＩＵ（刘昌铨）ＳＨＩＸＵＪＩＡ（嘉世旭）ＭＩＮＧＪＵＮＬＩＵ（刘明军）ＣＨＡＮＧＦＡＬＩ（李长发...