The Seismic Forecasting Of Reservoir For Dongling Area In Changling Sag

Guided by the theory of sequence stratigraphy, Reservoir Sedimentology and geophysics, based on carefully analyzing and referring the research fruits of the predecessors, sufficiently using the data of seismic, well logging and well drilling, adopting several methods of seismic, this paper forecasts and researches the reservoir of the Denglouku and Quantou formation in Dongling area.The research thinking of the paper is : the stratic layer thickness-> the sedimentary facies belt distribution-> the sandstone thickness distribution-> the favourable reservoir distribution-> the hydrocarbon bearing belt distribution. According to the rule from choosing to complicated, from determining the nature to determining the quantity, we carry out the predictive job of the reservoir step by step.Guided by the theory of sequence stratigraphy, we divide the layering of the formation (Denglouku formation and Quantou formation)of interest, and collate and stipulate the border and the inner border of the formation of interest. And then, based on the delicate interpretation of the seismic data, We obtain the distribution regular pattern of the Denglouku and Quantou formation and the inner layering of them.By means of the research of the single well sedimentary facies and the seismic facies carefully, we obtain the plan of sedimentary facies taking the inner layering of the Denglouku and Quantou formation as element. We comprehend the distribution regular pattern of the reservoir sedimentary facies belt in Dongling area, and have a qualificative knowledge of the reservoir distribution regular pattern and reservoir physical property.Based on the sensitivity analysis of lithology and reservoir logging, adopting seismic inversion,taking the inner layering as element, we carry out the quantitative forecasting of the sandstone thickness and the favourable reservoir distribution of sand. And then, We detect the hydrocarbon bearing quality of reservoir bed by using the property.By means of the application of the above mentioned technique and the multidisciplinary analysis of the hydrocarbon accumulation regular pattern and the element of the hydrocarbon reservoir formation, and on the basis of tectonic setting, the development degree of the trapping, the feature of the sedimentary facies belt distribution, the development degree of the favourable reservoir, the result of the hydrocarbon detection, the well drilling display situation, the testing and the production data etc, we divide the the hydrocarbon bearing belt into three kinds and point out the favourable hydrocarbon bearing belt.