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• W4254388664 abstract "Placing Proppant in a Naturally Fractured Reservoir With Unconventional Leakoff: A Field Case J.F. Cuesta; J.F. Cuesta Dowell Schlumberger Search for other works by this author on: This Site Google Scholar J.T. Markland J.T. Markland Cambourne School of Mines Search for other works by this author on: This Site Google Scholar Paper presented at the European Petroleum Conference, The Hague, Netherlands, October 1990. Paper Number: SPE-20971-MS https://doi.org/10.2118/20971-MS Published: October 21 1990 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Cuesta, J.F., and J.T. Markland. Placing Proppant in a Naturally Fractured Reservoir With Unconventional Leakoff: A Field Case. Paper presented at the European Petroleum Conference, The Hague, Netherlands, October 1990. doi: https://doi.org/10.2118/20971-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE Europec featured at EAGE Conference and Exhibition Search Advanced Search AbstractA proppant placement experiment was carried out in February 1989 at the Rosemanowes Research Site in Cornwall, England. The experiment was designed to produce a stimulated region of at least 50 m radial extent when viewed along the RH 15 production wellbore. This was believed to be the extent of a high impedance zone around RH15 identified from microseismicity induced during previous circulating, with RH 15 as the production well.The location of the stimulation interval within the wellbore was constrained by wellbore and reservoir considerations. After analysis of the mini-frac, originally intended to optimize the main-frac pumping schedule, a conservative approach was taken to the design of the proppant placement operation. The proppant was placed using a high viscosity placement operation. The proppant was placed using a high viscosity non-linear gel.Consideration of both mini-frac and main-frac operations along with evidence from diagnostic tools suggests that the fracture initially grew radially with subsequent substantial confined extension. Fracture growth is inferred to have developed from a single point exit in RH15 at a previously existing flow joint, and extended into a region of previously previously existing flow joint, and extended into a region of previously observed microseismicity. No wellbore damage was incurred. It is presumed that previous stimulations within the rock mass and thermal contraction resulting from prolonged reservoir circulation were controlling factors in fracture growth.The experiment successfully demonstrated the concept of proppant placement in a naturally fractured igneous reservoir.IntroductionThe Rosemanowes Geothermal waterflood has been operated continuously in naturally fractured granite since August 1985. During previous phases of reservoir development and subsequent circulation, evidence was collected which indicated restricted flow around the producing well RH15. This evidence took the form of both seismicity of low intensity around RH15 and hydraulic observations. Further observations during a 1987 Downhole Pump Test suggested that joints near to RH15 were closing as a result of the increased effective stress acting across them, following the increase in drawdown on the well, thus reducing the flow into the well.The purpose of the proppant placement test was to:–Demonstrate the concept of placing proppant in a naturally fracture digneous formation.–Reduce reservoir impedance around RH15.–Permit evaluation of the behaviour of propped fractures underincreased effective stress during a further Downhole Pump Test to be carried out later.ROSEMANOWES RESERVOIRReservoir EnvironmentThe Reservoir Environment as shown in Figure 1 summarizes the well geometries in the context of the prevailing principle stresses and geological structure (joint strikes). The producing well RH15 includes an openhole completion which, in plan, crosses the major joint set.P. 323 Keywords: viscosity, reservoir, rosemanowe, drillstem testing, hydraulic fracturing, pressure decline, viscous stimulation, stimulation, experiment, operation Subjects: Hydraulic Fracturing, Formation Evaluation & Management, Fracturing materials (fluids, proppant), Drillstem/well testing This content is only available via PDF. 1990. Society of Petroleum Engineers You can access this article if you purchase or spend a download." @default.
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• W4254388664 title "Placing Proppant in a Naturally Fractured Reservoir With Unconventional Leakoff: A Field Case " @default.
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