Technology
Assessment & Research (TA&R) Program
|
Project
Number |
18 |
| Date of Summary |
September 30, 1983 |
| Subject |
Overpressured Marine Sediments |
| Performing Activity |
Texas A&M Research Foundation |
| Principal Investigator |
Dr. L. Thompson |
| Contracting Agency |
Minerals Management Service |
| Estimated Completion |
Complete |
| Description |
To study the formation of
overpressured marine sediments to predict their occurrence during drilling operations. |
| Progress |
Complete. A consolidation theory
was developed which applied to the progressive burial of ocean bottom sediment, describing
porosity as a function of depth and time of various rates of deposition. Laboratory
experiments conducted by the principal investigator confirm the theoretical formulations
which challenge Terzaghi's time honored effective stress principle. Thompson contends that
pore water pressures in marine sediments can substantially exceed geo static pressures. A
review panel of Thompson's peers (see below report of Schiffman and 11 others) have stated
that the evidence is not convincing but that the implications of his theory, if correct,
have far reaching practical importance. The project was concluded and referred to the
National Science Foundation. |
| Reports |
AA
 (3.322
KB) |
Thompson, L. J., Chen, R. M.,
Bryant, W. R., Overpressured Marine Sediments, Texas A&M University, College Station,
Texas, January 1977. |
| AB (5.055
KB) |
Thompson, L. J., Overpressured
Marine Sediments; The Thermomechanics of Progressive Burial, Texas A&M University,
College Station, Texas, July 1979. |
| AC
(568
KB) |
Thompson, L. J., Soil and Rock
Contact Areas Revisited, Texas A&M University, College Station, Texas, October 1980.
(Unpublished) |
| AD
(3.949
KB) |
Lee, H. T., Compressibility and
Permeability of Clays at High Pressure, Masters Degree Thesis, Texas A&M University,
College Station, Texas, August 1980. |
| AE
(8.434
KB) |
Callanan, M. J., The Prediction
of Hydrofracture Pressure and K, During Drilling, Masters Degree Thesis, Texas A&M
University, College Station, Texas, August 1980. |
| AF
(650
KB) |
Schiffman, R. L., and 11 others,
Report on Research Being Conducted by Dr. Louis Thompson on Overpressured Marine
Sediments, March 10, 1981. |
| AG
(5.337
KB) |
Thompson, L. J., Callanan, M. J.,
Overpressured Marine Sediments, Volume I: The Prediction of Hydrofracture and K, During
Drilling, Texas A&M University, College Station, Texas, Mary 5, 1981. |
| AI
(3.130
KB) |
Miller, J. W., The Thermal Conductivity of
Sediments as a Function of Porosity, A Thesis, Texas A&M University, College
Station, Texas, August 1979. |
| AK
(1.251
KB) |
Huang, C. S., Childs, S. B., and
Thompson, L. J., Computer Analysis of the Consolidation of Ocean Bottom Sediments (draft),
Texas A&M University, College Station, Texas, August 1982. |
| AL
(1.162
KB) |
Morita, Nobuo. Gray, K. E.
Effective Stress Concepts, Definitions, and Restriction. Center for Earth Science and
Engineering University of Texas at Austin Austin, Texas. |
| AM
(1.034
KB) |
Morita, Nobuo. Gray, K. E. A
Constructive Equation for Nonlinear Stress-Strain Curves in Rocks and Its Application To
Stress Analysis Around a Borehole During Drilling SPE 9328. |
| AN
(411
KB) |
Scgiffman, Robert L.
Effective Stress Concept Texas A&M University Civil Engineering Department April 13,
1981. |
|
|
|
