TUNNEL HYDRAULIC FRACTURING EVALUATION AND COMPARING WITH CONVENTIONAL HYDRAULIC FRACTURING COMPUTATION
Hari K. Oetomo1, Djoko Sulistyanto1, Mohamad Romli2, Vera Veronica3 and Rizky Satrio Putra Sunjaya1

Petroleum Engineering Depertment, Universitas Trisakti, Jakarta, Indonesia

Abstract

Tunnel Hydraulic Fracturing is one method of well fracturing operation which generates tunnel in proppant filled fractured rock, near wellbore. The tunnels are in-between packs of proppant. The occurance of tunnel is caused by certain pumping technique during hydraulic fracturing operation. Frac fluid is pumped continuously, along with proppant is pumped intermittently. These tunnels generate high conductivity media in the fracturing geometry. The subject well was initially flow tested intermittently with 95% to 100% oil cut. The permeability from log correlations is 8 mD, with 1824 Psi reservoir pressure, from surrounding wells. Rock mechanic and type of stresses were evaluated to determine tunnel fracturing candidacy. After designing Tunnel Fracturing Design, operationally Pre-fracturing test sequences was executed, which is followed by re-design and operation of Mini frac test. The final design is followed by performing pulsed Mainfrac. The Tunnel Fracturing geometry was computed by service provider software, and the Productivity Index PI by spreadsheet. The Conventional Fracturing and its PI was computed by using spreadsheet. The Tunnel Hydraulic Fracturing PI was as much as 4.22 while Conventional Fracturing was 2.05

Keywords: Tunnel Hydraulic Fracturing, well fracturing operation, proppant, Productivity Index

Topic: Material Engineering