CAJ | 학술논문

塔里木盆地北部塔河奥陶系碳酸盐岩油藏以大型古岩溶洞穴为主要储集空间，由于岩溶、构造和上覆地层负载等作用，发育大量与古洞穴塌陷有关的独特储集体。本文在碳酸盐岩古洞穴联合垮塌体理论基础上，建立古洞穴塌陷单体地质和地震参数模型，地震物理参数以塔河油田石炭系和奥陶系钻井岩心岩石样品的波速和密度测试数据为基础。利用波动方程理论，对塌陷地质体进行地震正演模拟。通过不同子波主频的地震反射结构分析，认为该类储集体呈顶部“下凹”地震结构，随着主频增加，塌陷体具明显“串珠”状和“杂乱”地震反射特征。通过与实际三维高分辨率地震资料对比，认为岩溶塌陷储集体识别依据为：上覆地层下凹、地震杂乱强反射结构、与断裂与古暗河伴生等。
탑리목분지북부탑하오도계탄산염암유장이대형고암용동혈위주요저집공간，유우암용、구조화상복지층부재등작용，발육대량여고동혈탑함유관적독특저집체。본문재탄산염암고동혈연합과탑체이론기출상，건립고동혈탑함단체지질화지진삼수모형，지진물리삼수이탑하유전석탄계화오도계찬정암심암석양품적파속화밀도측시수거위기출。이용파동방정이론，대탑함지질체진행지진정연모의。통과불동자파주빈적지진반사결구분석，인위해류저집체정정부“하요”지진결구，수착주빈증가，탑함체구명현“천주”상화“잡란”지진반사특정。통과여실제삼유고분변솔지진자료대비，인위암용탑함저집체식별의거위：상복지층하요、지진잡란강반사결구、여단렬여고암하반생등。
The reservoir space of the Ordovician carbonate in the Tahe oilfield of north Tarim was found to consist mainly of large collapsed paleocaves formed by supergene karstification, tectonic activity,and loading effects of overly-ing strata.In this thesis,the seismic physical model and parameters of the collapsed paleocave have been established based on the hypothesis of ancient coalesced collapsed paleocave reservoirs.The seismic physical parameters based on rock wave velocity and density of drilling core in the Carboniferous and the Ordovician in Tahe oilfield.The characteriza-tion of paleocave composition in different dominant frequency was investigated by means of the forward seismic physics modeling technique.The seismic reflection structure of the collapsed paleocave reservoir appeared to sag downward.With the frequency increase of forward modeling,it also had characteristics of seismic reflection,which both showed string beads and chaos features. Comparison with the practical 3D high resolution seismic data,ascertain that the Identification process for karst collapse includes sag of overlying strata,seismic reflection structure of chaos features,near to rivers frac-ture and the ancient.