通过对车排子凸起南部石炭系油藏精细解剖认为,油藏为构造控制的岩性油气藏.目前已有的三维地震资料的石炭系内幕成像较差,对石炭系火山岩平面分布特征未有清晰认识,制约了该区油气勘探的全面展开.利用重、磁、电、震、井综合地球物理技术,对石炭系火山岩目的层进行井震标定、对比追踪,基于密度、磁化率、极化率异常匹配关系,并对石炭系基底断裂、火山岩岩性分布进行研究,在平面、空间上识别出一系列纵横叠置、不同序列、不同期次的火山岩体.据石油地质条件分析,综合评价5个含油气有利目标,8个含油气较有利目标,为下一步油气勘探及井位部署提供了理论依据.研究结果表明,高精度重、磁、电、井、震“五维一体”综合物探技术是解决石炭系火山岩油气勘探的重要手段.

JL2井西三维二叠系上乌尔禾组是中拐凸起主要产油层段之一,但对其储层分布规律、砂体展布范围认识不清.本文应用GeoEast地震储层综合预测技术,开展了储层预测、多属性模式识别、油气检测以及沉积相研究,落实了高效、规模储量区块.研究结果表明,JL2井西三维二叠系上乌尔禾组两个沟槽带是有利储层发育带,其内部断层发育,沟通油气运移通道的同时有效改善了储层物性.将GeoEast地震储层综合预测技术无监督模式识别方法应用于地震相划分、储层识别和油气检测,对储层进行定性分析,有效解决了地质综合研究中一些复杂的地质问题.

本次研究采用断面正应力大小、泥岩削刮比(SGR)、断裂带充填物泥质含量(Rm)和断面紧闭指数等定量参数,对车拐地区红车断裂封闭性进行了详细评价.结果 显示泥岩削刮比(SGR)均值为0.6,断裂带充填物泥质含量(Rm)均值为0.51,泥质充填程度较高,断面正应力大小变化不大,为69.54～73.11 MPa,整体较大,紧闭指数为1.28～8.25,均值为3.98.从而认为准噶尔盆地车拐地区红车断裂带二叠系及三叠系封闭性较好,侏罗系封闭性差.红车断裂带中部、北部断层封闭性较好,而发育于浅部乌尔禾组、三工河组内的小断层在现今及油气成藏期的封闭性也普遍较好.

通过对已知油气藏精细解剖,认为准噶尔盆地车排子凸起南石炭系油藏为构造控制的岩性油气藏.但已有的三维地震资料内幕成像质量较差,对石炭系地层格架及火山平面分布特征难以清晰认识,制约了油气勘探的全面展开.利用重、磁、电、震、井综合地球物理技术,通过井-震标定,对石炭系火山岩目的层进行地震对比追踪;基于密度、磁化率、极化率异常匹配关系,对石炭系基底断裂、局部构造、火山岩分布进行研究,在平面、空间上识别出一系列纵横叠置、不同序列、不同期次的火山岩体;推测了三个上石炭统残留洼槽,主要分布在HG6井西、KB1井区以及SM4井区;石油地质条件分析基础上,综合评价了五个含油气有利目标,八个含油气较有利目标,为下一步油气勘探及井位部署提供了理论依据.实践证明,高精度的重、磁、电、井、震综合地球物理勘探技术,是解决石炭系火山岩油气勘探的一个重要手段.

为查明准噶尔盆地西北缘车排子凸起南部石炭系油气成藏规律,对车排子凸起地质露头样品及CHH60井流体包裹体样品进行镜下观察和显微镜测温分析,样品在单偏下为浅棕黄色,荧光下呈明显浅黄、黄绿色;烃类包裹体在荧光及紫外光下呈淡蓝、绿色,有机质成熟度中等.均一温度测定对象均为烃类包裹体伴生的同期盐水包裹体及含烃盐水包裹体,按其相态,这些包裹体可分为单一液相包裹体、气液两相包裹体.其与烃类流体分布于3个温度段,即:三叠纪中晚期、早中白垩世及古近纪中晚期—新近纪早期.时间分别对应225～208 Ma、133～108 Ma和54～7 Ma.

红车断裂带结构特征及相关的成岩封闭作用是目前准噶尔盆地西北缘车拐地区断裂带研究中的热点,其内部结构能否准确、合理的划分对后续研究油气运移、断层封闭性等油气勘探中的关键问题具有十分的重要意义.本文综合利用野外地质露头、岩心资料,重点对红车断裂进行了详细的内部结构划分,其石炭系顶部断裂主要有北北西向、北西向、北东向和北东东向四个方向,主要发育平行式、网状、羽状、斜交式、梳式、交切式等平面组合关系,识别了红车断裂带南段发育的多条走滑断层,建立了多因素控制下断裂带内部结构发育模式.通过对断层控圈、裂缝输导、胶结封闭等方面的探讨,确立了断层对油气成藏的控制作用,为车拐地区的油气成藏及地震勘探井位部署提供了理论基础.

WVD (Wigner-Ville Distribution)Spectral decomposition convert seismic reflection amplitude as a function of space and time for the spectral amplitudes,and demonstrate the lateral variation of reservoir and its physical properties.This paper uses the prestack WVD data established a model according to the spectral decomposition principle,select the appropriate parameters,conducted the detection of the thin layer in oil and gas reservoir,analyzed the various seismic attributes and poststack geological characteristics of integrated oil,on the basis of the evaluation of the favorable target,deploy preliminary prospecting well.Compared the pridiction of oil-gas possibility and oil testing results of drilled well,the accuracy problem of gas reservoir prediction of Cretaceous Qingshui river formation in SM1 area was worked out,expanded the exploration field of natural gasin Shamenzi area,and reduced the risk of drilling.

齐古背斜位于准噶尔盆地南缘山前冲断带齐古断褶带,属南缘第一排构造.由于地表及地下地质结构复杂,地震资料品质较低,构造落实难度较大.运用综合地质建模技术,通过地面地质露头标定、钻井倾角资料及构造样式等分析,认为该背斜为深层断裂冲断、地层褶皱宽缓、中浅层被反冲断裂切割的双重构造模式.据新的构造模式重新认识齐古背斜构造成藏特征.

对车拐斜坡区三叠系百口泉组沉积相目前存在的认识不统一、有利储层分布范围认识不清等问题进行分析,综合利用目前完钻井的录井、测井、岩样的化验资料及三维地震属性技术,认为三叠系百口泉组整体经历了一个气候由干旱到潮湿,沉积水体由浅到深的湖侵沉积演化过程.研究区主要发育扇三角洲平原、扇三角洲前缘、滨浅湖3种亚相,三支扇体之间为扇间洼地,向凹陷逐渐过渡为扇三角洲前缘,凹陷中心为滨浅湖沉积.扇三角洲前缘储集岩孔隙度及渗透率较好,为最有利的沉积相带.

Zhongguai Uplift carboniferous in the western Junggar Basin was segmented by fault into different fault block reservoirs with different oil -water interfaces,which are all massive reservoirs with bottom water controlled by faults .In addition,the thick layered volcanic rock mass,the crack development,the dual medium,the complex oil -water relationship,the volcanic rock and the lava can all become good volcanic reservoir bodies .The drilling showed that the whole Zhongguai Uplift carboniferous system is generally oil -bearing,and the oil and gas in the high part of the paleo uplift is enriched ,which is a favorable exploration area .With the combination of volcanic rock lithology and lithofacies distribution character -istics,it was analyzed on the volcanic eruption pattern ,its distribution and main controlling factors.The fissure type volcaniceruption pattern was proposed ,of which distribution was mainly controlled by the crater and paleo geomorphology .

The method of datum correction of least static is superior to that of one-step statics correction with horizonal datum in theory.But how many advantages are there in its practical application?This paper takes Wellblock LN6 of Jung-gar Basin for example to compare the datum correction of least static with the one-step statics correction of horizonal da-tum in principle,statics calculation,and velocity-field-built.During identifying structural trap,good results have been ob-tained by using the technology of datum correction of least static.It provided a exploration well for drilling .

In Zhongguai Uplift of west Junggar Basin,large scale of oil and gas reservoirs of Carboniferous volcano res-ervoir have not been found in nearly 40 years of oil and gas exploration.Therefore,based on the fine processing and inter-pretation of seismic data,combined with many technologies,it was accurately predicted the development range of volcano reservoir in this area.Using seismic attributions and correlation analysis,the plane distribution scale of the favorable volca-no reservoirs was characterized.Using the characteristics of the seismic facies,various kinds of volcano traps were por-trayed.Finally,the vertical scale of volcano reservoir was determined by using the seismic inversion technologies.The fore-cast results showed that the drilled wells have obtained good industrial oil flows in Carboniferous system.

The attribute of seismic frequency spectrum decay can reflect the formations'absorption property、litho-facies and gas-bearing property.Making use of the gas-bearing formations'characteristic that can absorb the high frequency energy of seismic wave easily,we can predict gas reservoir in formations better.The Cretaceous exploration area in oil and gas has been expanded with the use of this technology to make an Oiliness detection in sq1 well area's cretaceous Qing-shuihe oil reservoir.On that basis,several cretaceous favorable goals have been found.

Based on well-core observation,slice,SEM,logging data and stable isotope analysis,the reservoir accumulating space types of Jurassic Badaowan Formation in Che-guai area,northwestern margin of Junggar Basin,are well studied.It is considered that conglomerate in the study area mainly developed primary intergranular pores,secondary intragranular dissolved pore and structural fractures;sandstones in the study area mainly developed primary intergranular pores,secondary intergranular dissolved pore and intragranular dissolved pore.The diagenesis characteristics of compaction,cementation and dissolution are studied.Conglomerate and sandstone of Jurassic Badaowan Formation are in stages A and B of late diagenetic stage.In addition,different diagenesis have different influential mechanism on reservoir space types and physical properties.Compaction can decrease the reservoir accumulating space,and makes the reservoir physical properties become worse.On the one hand,cementation can fill up the reservoir accumulating space,and make the reservoir physical properties become worse,on the other hand,it can support grain skeleton and decrease the influence of compaction,meanwhile,it can provide material for dissolution at the late diagenetic stage.Dissolution is a constructive communicating diagenesis,and it can produce secondary pores and fractures.

Reseach have been studying further that the reservoir in Che89 well Of the chepaizi area is controlled by lithology.The che89 well reservoir is a allimportant finding for Shawan formation of Neogene in Chepaizi area.The reservoir accumulated petroleum by controlled beach and dam of shore and shallow lake facies.There is characteristic of sandstone enveloped shale in vertical lithology compounding.Two formations and four lithology traps found by studying seismic sections.Research had obtained series of methods and processes by studying and describing these lithology traps. This is a foundation for us studying further.The study have gained great effect.another we had further discerned the range and spread of the reservoir sands.

The oil and gas show observed in the 70 more wells drilled in Block Well Xia-40 reveals that this area enjoys favourable oil and gas exploration prospect.The closure of the low-amplitude traps is relatively small,the characteristics of seismic reflection waves are different,both phase differences and discrepancies in closing existed in seismic explanation,routinely seismic migration imaging in complicated thrusting fault-fold area failed to return back,small faults and low-amplitude traps can not be easily identified,all these factors encumbered the exploration course.We tested the prestack time migration and prestack depth migration and establish the velocity models of both the shalow and deep sections in the studied area.Then we successfully fulfilled the reservoir description of Xia-72 reservoir on the basis of detailed structural explanation,and finally make a breakthrough of the oil and gas exploration in Permian in Block 2 of Xiazijie area.

Being faithful to seismic information self, seismic facies analysis technology can overcome some flaws of seismic inverse technique as one of important means for sedimentary facies research and reservoir prediction. It integrates with various of seismic information and can be adopted to deal with distinct problems. Stratimagic seismic facies analysis technology which realizes automatic seismic facies analysis technology with seismic trace and multi-attribute database in time window/depth intervals has been applied to study on channel distribution of in Shamenzi Area, Jurassic Badaowan formation is dominated by fan-delta sand body. Thereby allow their processes to better controls of continuous distribution and range of the major oil-bearing zone in the area, and good results have been obtained.