缝洞型碳酸盐岩储集体特征及预测——以A油田PZ段为例

doi:10.11743/ogg20120316

Abstract

Abstract:

This paper studied the reservoir of P_z layer in A oilfield.Fine cross-well calibration by using the technique of log-seismic integration can improve the lateral continuity and reliability of stratigraphic correlation.Mo-dern karst patterns were introduced to guide basement top structure interpretation,and to delineate pinch-out line and structural trap.The newly found buried hill structure is 52.7 km²,which increase the exploration area.We divided the palaeogeomorphology into peak-cluster depression,peak forest valley and paleo-erosive gulley with 3D visualization technique.Based on integration of geologic data,logging data and seismic response,we divided the reservoirs into three types including cavern-pore fracture-pore and fracture types.We delineated the distribution of the reservoirs through seismic inversion and ant tracking modeling.Type Ⅰ reservoirs(i.e.cavern-pore type)mainly occur on paleo-structure highs and their thickness enlarge along with their increasing height.Type Ⅱ reservoirs(i.e.fracture-pore type)distribute at the slope of the structure.Type Ⅲ reservoirs (i.e.fracture type)occur near faults,thus are significantly affected by the faults.

Key words: fracture-vug reservoir, carbonate rock, reservoir prediction

CLC Number:

TE121.1

Wang Zhaofeng, Chen Xin, Wang Peng, Yu Wenwen, Li Qiang. Characteristics and prediction of fracture-vug carbonate reservoirs -an example of P_z layer in A oilfield[J]. Oil & Gas Geology, 2012, 33(3): 459-466.

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Characteristics and prediction of fracture-vug carbonate reservoirs -an example of P_z layer in A oilfield

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Characteristics and prediction of fracture-vug carbonate reservoirs -an example of Pz layer in A oilfield

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Characteristics and prediction of fracture-vug carbonate reservoirs -an example of P_z layer in A oilfield