On the Subject of Abnormally Pressured Gas Reservoirs
- William Hurst (Petroleum Consultant)
- Document ID
- Society of Petroleum Engineers
- Journal of Petroleum Technology
- Publication Date
- December 1969
- Document Type
- Journal Paper
- 1,509 - 1,510
- 1969. Society of Petroleum Engineers
- 5.4 Improved and Enhanced Recovery
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This is a discussion of SPE-2225-PA “Water Production from Abnormally Pressured Gas Reservoirs in South Louisiana”, by W. E. Wallace, published in the Aug., 1969, issue of JPT.
In his paper on abnormally pressured gas reservoirs in South Louisiana, the main thesis as expressed by W. E. Wallace is that in high pressure gas fields much of the water produced with the gas results from the compaction of the shale from the weight of the overburden with the lowering of reservoir pressure to release water to be produced with the gas. This is his conclusion for several of the examples cited in his paper, and as he terms this, such is water produced from the shales and in-situ water resulting from the compressibility of the water within the reservoir.
If he wishes to approach it as such, I recognize that his thinking is that of the geologist whereas my interpretation is that of a reservoir engineer.
Mr. Wallace describes this water released as the compaction of the shale bodies, subject to the increasing weight of the overburden with the lowering in reservoir pressure. But I must ask, “To what extent does the weight of the overburden take effect?”
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