石油勘探与开发
石油勘探與開髮
석유감탐여개발
PETROLEUM EXPLORATION AND DEVELOPMENT
2001年
2期
50-52
,共3页
地震异常%地质构造%特征%地震反射%结构%古河道%生物礁
地震異常%地質構造%特徵%地震反射%結構%古河道%生物礁
지진이상%지질구조%특정%지진반사%결구%고하도%생물초
塔里木盆地在奥陶系、石炭系和二叠系等不同层系中存在很多地震异常体，这些异常体多数因沉积作用、构造作用而形成，部分已被钻井证实为特殊异常体，大部分异常体还未进行钻探。依据地震反射特征和内部反射结构识别异常体地质属性，将其归纳为9类，即下切状、楔状、丘状斜交前积、蘑菇状、树枝状、枕状、丘状、下凹状和透镜状异常体。通过沉积环境、速度分析以及合成声波处理研究后认为，这些异常体多数为陆相古河道砂体或海相生物礁、滩的反映，储集条件优越，如果有充足的油气源，无疑是今后勘探的有利目标。在钻探这类圈闭和目标之前，必须紧密结合地球物理、地质、测井分析，进行综合评价，才能减少风险，取得较理想的钻探效果。图1参1(李建国摘)
塔裏木盆地在奧陶繫、石炭繫和二疊繫等不同層繫中存在很多地震異常體，這些異常體多數因沉積作用、構造作用而形成，部分已被鑽井證實為特殊異常體，大部分異常體還未進行鑽探。依據地震反射特徵和內部反射結構識彆異常體地質屬性，將其歸納為9類，即下切狀、楔狀、丘狀斜交前積、蘑菇狀、樹枝狀、枕狀、丘狀、下凹狀和透鏡狀異常體。通過沉積環境、速度分析以及閤成聲波處理研究後認為，這些異常體多數為陸相古河道砂體或海相生物礁、灘的反映，儲集條件優越，如果有充足的油氣源，無疑是今後勘探的有利目標。在鑽探這類圈閉和目標之前，必鬚緊密結閤地毬物理、地質、測井分析，進行綜閤評價，纔能減少風險，取得較理想的鑽探效果。圖1參1(李建國摘)
탑리목분지재오도계、석탄계화이첩계등불동층계중존재흔다지진이상체，저사이상체다수인침적작용、구조작용이형성，부분이피찬정증실위특수이상체，대부분이상체환미진행찬탐。의거지진반사특정화내부반사결구식별이상체지질속성，장기귀납위9류，즉하절상、설상、구상사교전적、마고상、수지상、침상、구상、하요상화투경상이상체。통과침적배경、속도분석이급합성성파처리연구후인위，저사이상체다수위륙상고하도사체혹해상생물초、탄적반영，저집조건우월，여과유충족적유기원，무의시금후감탐적유리목표。재찬탐저류권폐화목표지전，필수긴밀결합지구물리、지질、측정분석，진행종합평개，재능감소풍험，취득교이상적찬탐효과。도1삼1(리건국적)
In Tarim basin there are many seismic anomaly bodies in the Ordovician, Carboniferous and Permian which are mostly caused by sedimentary and structure process. Some of them have been discovered and proved by drilling well and most of them are not. Based on the seismic reflection characteristics and inside reflection structure these seismic anomaly bodies could be classified into 9 kinds as downward cut, wedge, mound diagonal forest, mushroom, arborization, pillow, dome, down concave and lenticular bodies. Depending on the study of sedimentary environment, seismic velocity analysis and synthetic sonic logs proceeding, most of them are confirmed as nonmarine paleo-channel bar or marine reef and organic bank with good reservoir condition. They will become exploration targets if nearby there have sufficient hydrocarbon source. To a favorable seismic anomaly body research work of geophysics, geology and logging must be united and the comprehensive study should go deeply to reduce the exploration risk and get a good result.
