Evaluation of formation permeability using time-lapse measurements during and after drilling. Annual report, December 1990
The research project is designed to study the mechanisms controlling mud filtrate invasion and to develop correlations for estimating formation permeability from time lapse logging measurements. The genesis of the project came from research performed at Texas A M University plus data gathered since 1986 by the GRI Tight Gas Sands program in east Texas. Multiple logging runs have been made on several GRI cooperative research wells and Staged Field Experiment wells. Data from previous GRI experiments clearly show the effects of mud filtrate invasion upon the readings from openhole geophysical logs. To improve upon previous research, the authors are now measuring the permeability of typical mudcakes that form on low permeability formations. During 1990, the authors have developed new methods of measuring mudcake permeability and have demonstrated that mudcakes form very slowly on formations with absolute permeability values less than 1 md. They also plan to compile a catalog of radial response functions for a variety of openhole logging tools and MWD tools. The mudcake permeability data and radial response functions will be used in a finite difference numerical simulator to evaluate data from field experiments. The first field experiment will occur in 1991 at the Mobil Lake Creek Field. The annual report presents a detailed discussion of the research goals and research results achieved during 1990.
- Research Organization:
- Texas A and M Univ., College Station, TX (United States)
- OSTI ID:
- 5495060
- Report Number(s):
- PB-91-206466/XAB; CNN: GRI-5089-260-1861
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mudcake buildup and invasion in low permeability formations; application to permeability determination by measurement while drilling. Topical report, September 1991-August 1993
Estimating formation permeability
Related Subjects
030200* -- Natural Gas-- Reserves
Geology
& Exploration
DEVELOPED COUNTRIES
DIFFUSION
DRILLING
DRILLING FLUIDS
ENGINEERING
EQUIPMENT
FEDERAL REGION VI
FINITE DIFFERENCE METHOD
FLUIDS
FUNCTIONS
GEOLOGIC DEPOSITS
ITERATIVE METHODS
MATHEMATICAL MODELS
MEASURING METHODS
MINERAL RESOURCES
MWD SYSTEMS
NATURAL GAS DEPOSITS
NATURAL GAS WELLS
NORTH AMERICA
NUMERICAL SOLUTION
PERMEABILITY
RESEARCH PROGRAMS
RESERVOIR ENGINEERING
RESOURCES
RESPONSE FUNCTIONS
TEXAS
TIME DEPENDENCE
USA
WELL DRILLING
WELL LOGGING
WELL LOGGING EQUIPMENT
WELLS