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| THE APPLICATION OF TDI TO PREDICTING POROSITY IN DEEP OVERPRESSURE ENVIRONMENT |
| YUE You-xi1, YUAN Qing1,2, HAN Hong-wei3, LIU Shi-zhong3 |
1. School of Geosciences, China University of Petroleum, Qingdao 266555, China;
2. Gudong Oil Production Plant, Shengli Oilfield Co. , Ltd. , Dongying 257237, China;
3. Geophysical Research Institute, Shengli Oilfield Co. , Ltd. , Dongying 257022, China |
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Abstract Porosity is an important parameter in reservoir description.Reservoir porosity is mainly influenced and controlled by sedimentary facies and diagenesis.In this paper the method of porosity prediction in the overpressure environment by utilizing TDI (time-depth index) has been studied.The key to this method lies in establishing the correlation model and recovering burial history curve including recovering denudation and decompaction correction.In the process of calculating TDI,the overpressure value is predicted according to the 3D velocity field and pressure coefficient,and is introduced into the formula of effective burial depth calculation to correct the affect caused by the overpressure environment.Porosity prediction model suitable for overpressure formation has been established.It can provide scientific basis for oil and gas exploration of deep zones.
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Received: 01 August 2011
Published: 10 October 2012
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