Abstract
Characteristics of pressure decay curves after shut-in, i.e., shut-in curves, in hydraulic fracturing stress measurements were studied theoretically and experimentally for the case that a transverse crack is induced perpendicularly to a wellbore axis. Based on the characteristics, a method to evaluate the shut-in pressure, i.e., the tectonic stress normal to the crack plane, was developed. The method utilizes the plot of the inverse of pressure decrease rate vs the pressure after shut-in. The plot can be divided into two segments, where the plot fits to a straight line in each segment. Then, the shut-in pressure can be evaluated as the pressure at the intersection of the two straight lines. The method is successfully applied to the pressure decay curves after shut-in obtained in laboratory experiments.
| Original language | English |
|---|---|
| Pages (from-to) | 651-656 |
| Number of pages | 6 |
| Journal | Transactions - Geothermal Resources Council |
| Volume | 16 |
| Publication status | Published - 1992 Dec 1 |
| Event | 1992 Annual Meeting of the Geothermal Resources Council - San Diego, CA, USA Duration: 1992 Oct 4 → 1992 Oct 7 |
ASJC Scopus subject areas
- Geology
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering