CAJ | 학술논문

胜利油田存在着一种特殊的裂隙性油气藏,即泥岩裂隙油气藏.由于该类裂隙储层的孔隙度很小,岩石物性参数变化不灵敏,并表现出很强的各向异性,因此,其勘探难度很大.到目前为止,国内外还没有一套成熟的地质、物探、测井及钻井等资料综合分析的裂隙方位、分布、密度的识别方法.本文在研究国外裂缝检测方法的基础上,提出了波阻抗随方位变化(IPVA)的新方法,结合罗家地区的泥岩裂隙地震地质特征,研究了利用多方位P波资料检测定向垂直裂缝的地震采集、处理和识别方法,对不同共中心点CMP位置的全方位P波资料在速度随方位变化(VVA)及振幅随方位角变化(RVA)研究的基础上,进行波阻抗随方位变化(IPVA)的研究,用于识别裂缝的分布、走向及密度.经罗家地区实际资料的应用,见到了初步的效果,证明该方法是潜力较大的高角度裂隙的定量检测方法.
성리유전존재착일충특수적렬극성유기장,즉니암렬극유기장.유우해류렬극저층적공극도흔소,암석물성삼수변화불령민,병표현출흔강적각향이성,인차,기감탐난도흔대.도목전위지,국내외환몰유일투성숙적지질、물탐、측정급찬정등자료종합분석적렬극방위、분포、밀도적식별방법.본문재연구국외렬봉검측방법적기출상,제출료파조항수방위변화(IPVA)적신방법,결합라가지구적니암렬극지진지질특정,연구료이용다방위P파자료검측정향수직렬봉적지진채집、처리화식별방법,대불동공중심점CMP위치적전방위P파자료재속도수방위변화(VVA)급진폭수방위각변화(RVA)연구적기출상,진행파조항수방위변화(IPVA)적연구,용우식별렬봉적분포、주향급밀도.경라가지구실제자료적응용,견도료초보적효과,증명해방법시잠력교대적고각도렬극적정량검측방법.
A type of specific fractured hydrocarbon reservoir, a shale fractured reservoir,exists in the Shengli oilfield. Due to very small porosity of this type, low sensitivity to the variation of petrochemical property parameters, and strong anisotropy, it is very difficult to explore for them. So far, there is no set of mature methods for recognition of direction,distribution, and density of the fractures by an integrated analysis of geologic, geophysical,well log, drilling data, and etc. This paper presents a new method for acoustic impedance variation with azimuth (IPVA), based on existing fracture detection methods. Seismic acquisition, processing, and recognition techniques were developed for detecting directional vertical fractures using multi-azimuth P wave data in combination with the seismic and geological features of shale fractures in the Luojia area. The IPVA research is carried out for recognizing the distribution, strike, and density of fractures based on the study of velocity variation with azimuth (VVA) and amplitude variation with azimuth (AVA) for full azimuth P wave data at different CMP positions. Through practical application in the Luojia area,primary results have been obtained which verifies that the IPVA method provides good potential for quantitative detection of parallel, high angle, shale fractures.