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

Issue:

2010年第04期

Page:

355-362

Research Field:

基础地质与矿产地质

Publishing date:

Info

Title:

Study on Log Interpretation for Water Flooded Layer of the Complex Fault Block Oil Reservoir in the Second Member of Shahejie Formation of Shengtuo Oilfield

Author(s):

CHEN Ning-ning;  YANG Shao-chun;  HUANG Jian-ting

(School of Geo-resources and Information, China University of Petroleum, Dongying 257061, Shandong, China)

Keywords:

log interpretation;  complex fault block;  water flooded layer;  Shahejie Formation;  Shengtuo Oilfield

PACS:

P631.8

DOI:

-

Abstract:

Based on the data of sealed core well, taking the typical complex fault block reservoir in Shengtuo Oilfield as an example, log interpretation model was built to interpret the well logging for water flooded layer of the complex fault block oil reservoir in the 1-3 sandstone group of the Second Member of Shahejie Formation. Firstly, response characteristic of the water flooded layer was introduced; secondly, log data was standardized by the method of polynomial trend surface analysis; thirdly, the key well with complete log data, dependable quality, drilling core and logging, and test oil data was selected; fourthly, log interpretation model was built according to oil testing and extraction and drill core data. The results showed that the complex fault block oil reservoir in the 1-3 sandstone group of the Second Member of Shahejie Formation of Shengtuo Oilfield had been in the stage of high water cut, baseline of self potential curve shifted, formation resistivity and natural gamma decreased, and acoustic time increased in water flooded layer; high resistant dolomite segment(thickness was 8-12 m)in the top of the Second Member of Shahejie Formation was selected as a key bed for standardization; the method of cubic trend surface analysis for acoustic time was acceptable, the degree of fitting was 22.6%, the average correcting value was 14 μs/m; T4j17 and T2-121 were selected as key wells, in which core well section and recovery of core were optimal, and related data were abundant with high quality, to show the characteristics of the complex fault block oil reservoir in the 1-3 sandstone group of the Second Member of Shahejie Formation; the log interpretation models built were shale volume fraction, median size, porosity, permeability, water saturation, and so on. Finally, log interpretation data was used to export the main parameters by means of well-by-well, point-by-point and layer-by-layer, and verify the models, in order to evaluate the effect of log interpretation models. The results showed that compared with physical property of core and related observation, the simulation of log interpretation models had good agreement with the observed data, and could provide an effective reference for improving waterflood development.

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Memo

Memo:

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Common functions

Last Update: 2010-12-20