|Table of Contents|

Fluvial Facies Reservoir Interbed Genesis Category and Distribution Characteristic in Low Oil Group Triassic Tahe Oilfield(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2009年第03期
Page:
260-264
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Fluvial Facies Reservoir Interbed Genesis Category and Distribution Characteristic in Low Oil Group Triassic Tahe Oilfield
Author(s):
FU Guo-min1;  ZHOU Li-mei2;  LIU Rui2;  WANG Yan-wei2;  MIAO Jing3;  LI Lei3
(1.School of Earth Sciences and Resources, Chang'an University, Xi'an 710054, Shaanxi, China; 2.Northwest Oilfield Company, China Petroleum and Chemical Corporation, Urumqi 830011, Xinjiang, China; 3.Zhongyuan Oilfield Company, China Petroleum and Chemical Corporation, Puyang 457001, Henan, China)
Keywords:
interbed;  fluvial facies;  low oil formation;  Tahe 9 area
PACS:
TE343
DOI:
-
Abstract:
Through analyzing the cores, logging data and geological statistics, the genetic category and distribution characteristic of fluvial facies reservoir Interbed is studied. The result shows that the genetic category of interbed can be divided into inter-unit interbed and intra-unit interbed, among which only intra-unit interbed can be contrasted between wells and may have a great effect on restraining bottom water coning. On the basis of rock category and rock electrics character, interbed may be divided into muddy intercalation, calcareous intercalation and low permeable sub-layer. Muddy intercalation which forms overflow deposit extends well and is the main interbed category. Low oil formation could be divided into 11 stably extended interbeds. However, at present net well, the interbed is inconstant among wells. Most of the intra-unit interbeds are small-sized, utmost unsteadily and uncontinuous among wells. They can not shelter from water flooding and beneath water obviously. The average density of interbed is 0.14 in low oil formation with an average frequency of 0.07. It is thus clear that interbeds are undeveloped generally. The plane of interbed approximately distributes northwest and south-north. The ratio of width to thickness is about 1:80～ 1:100, and the width is approximate 200～500 m. It is meaningful that clearing the distribution characteristic of interbeds guides the injection exploitation of bottom water reservoir.

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Last Update: 2009-09-20