天然气工业
天然氣工業
천연기공업
NATURAL GASINDUSTRY
2000年
5期
39-41
,共3页
杨开珍%陈伟明%王德新%李书舜
楊開珍%陳偉明%王德新%李書舜
양개진%진위명%왕덕신%리서순
四川盆地%西%浅层气%地震数据处理%地震解释%砂体%横向预测
四川盆地%西%淺層氣%地震數據處理%地震解釋%砂體%橫嚮預測
사천분지%서%천층기%지진수거처리%지진해석%사체%횡향예측
Sichuan Basin%West%Shallow gas%Seismic data processing%Seismic interpretation%Sand body%Lateral prediction
近年来，四川盆地浅层天然气的勘探开发进入了新阶段，储量、产量迅速增长，在评价勘探中，精细的二、三维地震解释，在储层精细描述、储量计算、制订开发方案等方面起着重要作用。浅层天然气的勘探开发实践及地震资料的精细处理解释表明，浅层含气砂体地球物理响应特征是解释和标定含气砂体的主要依据，其振幅变化为基础的多参数综合分析技术，提供了区分砂体含气性方法。在区内当含气砂体的波阻抗小于其上下围岩，其顶底界面的反射呈上负下正、(视)频率较低、振幅较强的特征，即含气砂体与上覆地层的波阻抗差越大，则反射波波谷的振幅越强；与下伏地层的波阻抗差越大，则反射波的波峰振幅越强。
近年來，四川盆地淺層天然氣的勘探開髮進入瞭新階段，儲量、產量迅速增長，在評價勘探中，精細的二、三維地震解釋，在儲層精細描述、儲量計算、製訂開髮方案等方麵起著重要作用。淺層天然氣的勘探開髮實踐及地震資料的精細處理解釋錶明，淺層含氣砂體地毬物理響應特徵是解釋和標定含氣砂體的主要依據，其振幅變化為基礎的多參數綜閤分析技術，提供瞭區分砂體含氣性方法。在區內噹含氣砂體的波阻抗小于其上下圍巖，其頂底界麵的反射呈上負下正、(視)頻率較低、振幅較彊的特徵，即含氣砂體與上覆地層的波阻抗差越大，則反射波波穀的振幅越彊；與下伏地層的波阻抗差越大，則反射波的波峰振幅越彊。
근년래，사천분지천층천연기적감탐개발진입료신계단，저량、산량신속증장，재평개감탐중，정세적이、삼유지진해석，재저층정세묘술、저량계산、제정개발방안등방면기착중요작용。천층천연기적감탐개발실천급지진자료적정세처리해석표명，천층함기사체지구물리향응특정시해석화표정함기사체적주요의거，기진폭변화위기출적다삼수종합분석기술，제공료구분사체함기성방법。재구내당함기사체적파조항소우기상하위암，기정저계면적반사정상부하정、(시)빈솔교저、진폭교강적특정，즉함기사체여상복지층적파조항차월대，칙반사파파곡적진폭월강；여하복지층적파조항차월대，칙반사파적파봉진폭월강。
In recent years, the shallow natural gas exploration and development in Sichuan Basin have entered into a new stage and its reserves and production are rapidly increased, which plays an important role in these respects as evaluation exploration, detailed 2-D and 3-D seismic interpretation, detailed reservoir description, reserve estimation and making up development plan, etc. In light of the practice of the shallow natural gas exploration and development and the detailed processing and interpretation of seismic data, it is shown that the geophysical response characteristics of shallow gas-bearing sandbodies are the major bases of interpreting and calibrating gas-bearing sandbodies. The method of differentiating the gas potential of the sandbodies may be determined by use of multivariable comprehensive analysis technique on the basis of a change in its amplitude. In this region, while the wave impedance of gas-bearing sandbody is smaller than its up-and-down sourrounding rocks, the reflection of its top-and-bottom interfaces shows the characteristics as a negative at top and a positive at bottom, relatively low (apparent) frequency and relatively strong amplitude, i. e, the larger the wave impedance difference between the gas-bearing sandbody and its overlying formation, the stronger the amplitude of reflection wave trough; the larger the wave impedance difference between the gas-bearing sandbody and its underlying bed, the stronger the amplitude of reflection wave crest.
