Accommodation Space Transformation System in Faulted Basin
نویسندگان
چکیده
The variation of accommodation space in faulted basin is mainly affected by three factors: the differential subsidence of basement, the deposition of sediments and the variation of absolute lake level. In this article, the variation laws of accommodation space have been analyzed and its distribution characteristics have been explained when the lake level is descending, still and ascending and the deposition and subsidence are taken into account. And at the same time, the existence conditions of transformational belt and its planimetric positions can be figured out with analyses above. Accommodation space changes both through time and basin, as a see-saw movement, which is called accommodation space transformation. The characteristics of accommodation space and its products constitute the accommodation transformation system. Transformation surface and body are basic elements of the accommodation transformation system. The accommodation transformation system can be divided into several grades according to originating mechanism and product characteristics. It is considered that formations in different grades of transformation system have different features of sand body and hydrocarbon potential.
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