Prediction about the Abundant Belts of Tight Sandstone Gas#br#
Reservoirs Through Gradual Penetration

doi:10.11885/j.issn.1674-5086.2015.01.15.11

Abstract

Abstract:

The sand gas reservoir of the upper sub-member of segment Xu4 in the western Yuanba region is characteristic of deep
burial，and the reservoir rock is mainly compose of grey and light-grey calcarenaceous sandy conglomerate and calcare-naceous
sandstone. Generally the reservoir is dense and thin，and of low porosity and low permeability fracture-pore. The testing results
of many wells show that calcarenaceous sandy conglomerate and calcarenaceous sandstone distribution with certain thickness
and pore development and fracture development control the abundant belts of natural gas. Considering the characteristics of
gas reservoir in the upper sub-member of segment Xu4，the characteristics of rock physical response of calcarenaceous sandy
conglomerate，and according to the gradual penetration principle，we made statistical probability prediction about the lithologic
using pre-stack elastic inversion on the basis of pre-stack simultaneous inversion，and obtained the beneficial lithologic distribution
area. By using physical parameter prediction method，we obtained effective thickness and distribution of the reservoir
in the beneficial lithologic distribution area on the basis of frequency division data volume. On the basis of pre-stack seismic
fracture density prediction and petrophysical parameters，made prediction about the abundant belts of natural gas of the upper
sub-member of segment Xu4.

Key words: tight sandstone gas reservoirs, lithologic probability statistical prediction, abundant belts, upper sub-member of
segment Xu4, western Yuanba region

CLC Number:

TE122

PU Yong1，2*. Prediction about the Abundant Belts of Tight Sandstone Gas#br# Reservoirs Through Gradual Penetration[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2015.01.15.11.

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Prediction about the Abundant Belts of Tight Sandstone Gas#br# Reservoirs Through Gradual Penetration

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