Prediction Of Triassic Reef And Beach Reservoir In Fuxing Area

The reserves found in Marine strata are less than 10% In China.Large oil-gas fields in the world account for about 60% of the proven reserves of oil and gas in Marine carbonate strata.At present,the proved reserves in Marine carbonate strata only account for 5 % of the total proved reserves,which shows that there is great potential for petroleum exploration in Marine carbonate system in China.The Triassic reef-bank reservoir in Fuxing area is a new exploration area after the large reef-bank reservoir such as the Puguang,Yuanba,Longgang,Maoba gas field,how to use reservoir prediction technology to accurately predict Triassic reef and beach reservoirs and determine the vertical and horizontal distribution characteristics of high quality reservoirs is the key to the high and stable yield of the Triassic feixianguan formation.In this paper,the key problems affecting reservoir prediction accuracy in this area are identified by the collected scientific research achievements and literature of similar reservoirs in similar areas and analysis and summary of reservoir prediction of reef bank in other areas.Carry out seismic model forward work Start with the well drilled under the guidance of regional sedimentary background,established the seismic response characteristics of reef-bank bodies,the development position of reef-bank and reservoir are defined by reservoir calibration at the same time.reef-bank spread are identified by seismic reflection feature and seismic properties on the section;in the plane,technology application of seismic slice,seismic attribute analysis of coherent and variance,spectrum imaging can describe the reef-bank spread characteristics;Determined the sensitivity parameters for adaptive reservoir prediction method by the reservoir characteristics analyzed,and carried out seismic inversion on this basis,fine predicted the thickness and porosity of reservoir and the distribution characteristics of reservoir.This subject use Triassic reef-bank reservoir in Fuing area as an example,research in the reservoir characteristics of Feixianguan group.determined the distribution characteristics and prediction method of reservoir for this kind of small reef-bank reservoir,Which provides important significance and theoretical value for seismic interpretation andreservoir prediction of small reef-bank and guide the similar research area exploration deployment as well.