HGP-A reservoir engineering

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dc.contributor.authorYuen, Paul C.
dc.contributor.authorChen, Bill H.
dc.contributor.authorKihara, Deane H.
dc.contributor.authorSeki, Arthur S.
dc.contributor.authorTakahashi, Patrick K.
dc.date.accessioned2020-04-21T00:01:11Z
dc.date.available2020-04-21T00:01:11Z
dc.date.issued1978-09
dc.description.abstractThe Hawaii Geothermal Project well HGP-A has undergone a two-year testing pr.ogram which included cold water pumpdown tests, flashing flows with measurements of temperature and pressure profiles, and noise surveys. These tests and the data obtained are discussed in detail. While the pumpdown tests conducted right after the slotted liner had been installed and the mud removed indicated that the well had very poor permeability, HGP-A was flashed successfully on July 2, 1976. Maximum quiescent bottomhole temperature following that initial flash was measured to be 358°C. Comparison of subsequent discharges shows that with each succeeding test, the flow rate has increased, possibly due to the displacement of drilling mud embedded in the wellbore surface. The flow rates range from a maximum of 101 Klb/hr at wellhead pressure of 51 psig to a throttled 76 Klb/hr at 375 psig wellhead pressure, with possible electrical power production of 3.0 to 3.5 MWe. Temperature and pressure profiles taken during flow tests indicate that the fluid in the we1lbore is a mixture of liquid and vapor at saturation conditions. The absence of a liquid level during flashing discharge confirms that flashing is occurring in the formation. Pressure drawdown and buildup analyses yield a value of transmissibility (kh) of approximately 1000 millidarcy-feet with a pressure drop across the apparently damaged skin of 500-600 psi. The pressure profiles taken during flashing flow consist roughly of three approximately constant gradient lines that intersect at the junction of the casing and the slotted liner, and at approximately 4300 feet depth, which leads to the conclusion that the major production zones are near bottomhole and in the vicinity of 4300 feet. Furthermore, the data points on the log-log Horner type plot seem to fallon two different but consecutive straight-line approximations. This could be interpreted to be the result of two different production layers with different kh values.
dc.description.sponsorshipU.S. Department of Energy
dc.description.sponsorshipDOE Contract EY-76-C-03-1093
dc.description.sponsorshipEnergy Research and Development Administration, Contract E(04-3)-1093
dc.description.sponsorshipNational Science Foundation, Grant GI 38319
dc.description.sponsorshipState of Hawaii, Grants RCUH 5774, 5784, 5942
dc.description.sponsorshipCounty of Hawaii, Grant RCUH 5773
dc.description.sponsorshipHawaiian Electric Company, Grants 5809, 5828
dc.format.extent104
dc.identifier.citationYuen PC, Chen BH, Kihara DH, Seki AS, Takahashi PK. 1978. HGP-A reservoir engineering. Honolulu (HI): College of Engineering, University of Hawaii at Manoa.
dc.identifier.urihttp://hdl.handle.net/10524/63238
dc.language.isoeng
dc.publisherCollege of Engineering, University of Hawaii at Manoa
dc.subjectengineering
dc.subjectgeothermal engineering
dc.subjectKilauea
dc.subjectPuna
dc.subjectBig Island
dc.subjectHawaii
dc.subject.lcshGeothermal resources--Hawaii--Hawaii Island
dc.subject.lcshGeothermal resources--Hawaiʻi
dc.titleHGP-A reservoir engineering
dc.typeReport
dc.type.dcmiText

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