First Implementation of Hydrajet Fracture Acidizing in Deepwater Offshore Brazil Fields (2005)

First Implementation of HydraJet Fracture Acidizing in Deepwater Offshore Brazil Fields Valdo Ferreira Rodrigues; Valdo Ferreira Rodrigues Petroleos Brasileiro S.A. Search for other works by this author on: This Site Google Scholar Luis Fernando Neumann; Luis Fernando Neumann Petrobras S.A. Search for other works by this author on: This Site Google Scholar Marcos Antonio Rosolen; Marcos Antonio Rosolen Petroleos Brasileiro S.A. Search for other works by this author on: This Site Google Scholar Paulo Dore Fernandes; Paulo Dore Fernandes Petrobras S.A. Search for other works by this author on: This Site Google Scholar Claudio Benevenuto Lima; Claudio Benevenuto Lima Petrobras Search for other works by this author on: This Site Google Scholar Jim Basuki Surjaatmadja; Jim Basuki Surjaatmadja Halliburton Energy Services Group Search for other works by this author on: This Site Google Scholar Carlos Miranda Gonzalez; Carlos Miranda Gonzalez Halliburton Search for other works by this author on: This Site Google Scholar Fernando A.S. Carneiro Fernando A.S. Carneiro Halliburton Services Ltd. Search for other works by this author on: This Site Google Scholar Paper presented at the SPE European Formation Damage Conference, Sheveningen, The Netherlands, May 2005. Paper Number: SPE-94706-MS https://doi.org/10.2118/94706-MS Published: May 25 2005 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Rodrigues, Valdo Ferreira, Neumann, Luis Fernando, Rosolen, Marcos Antonio, Fernandes, Paulo Dore, Lima, Claudio Benevenuto, Surjaatmadja, Jim Basuki, Gonzalez, Carlos Miranda, and Fernando A.S. Carneiro. "First Implementation of HydraJet Fracture Acidizing in Deepwater Offshore Brazil Fields." Paper presented at the SPE European Formation Damage Conference, Sheveningen, The Netherlands, May 2005. doi: https://doi.org/10.2118/94706-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search nav search search input Search input auto suggest search filter All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE European Formation Damage Conference and Exhibition Search Advanced Search AbstractThe placement of multiple fractures in horizontal, deviated wells is usually more difficult than placement in vertical wells. When completed with uncemented preperforated liners, such treatments become much more difficult and often are ineffective using conventional stimulation methods. When found in offshore locations, these wells present even more problems.Recently, in the shallow waters offshore Brazil, a relatively new hydrajetting technology was used with great success. However, additional complications arose when hydrajet fracturing was elected to stimulate a subsea well. This process requires dual high-pressure connections to the wellbore, including placement of a tubing string inside the full length of the well.Maintaining the hydrajet tool in position during each fracturing stage was a big issue in a floating rig. The need to pulltubing between stages of the stimulation process also poses a challenge.Because this operation occurred in a subsea well, it was the first such application ever attempted worldwide. Extremely detailed planning was essential to the ultimate success of the operation. This paper discusses the rigorous planning involved in implementing multistage hydrajet fracture acidizing in a subsea well offshore Brazil. During the operation, all challenges, mechanical or otherwise, were meticulously scrutinized, including the proper operation of the stimulation vessel and riser motion. This paper also presents post-treatment production results evaluated and compared to other stimulation attempts in offshore horizontal completions in the area.IntroductionCased cemented completions have not been the preferred horizontal well completion method in offshore Brazil. Within completions where sand control is a must, openhole gravel packing has been the usual completion. In stable sandstone and carbonates in general, preperforated liners have been usedand are known in the industry to be very effective. Often, however, low producing rates suggest that stimulation treatments are necessary for many wells. Conventional stimulation technology has generally been unsuccessful for these horizontal completions, and operators have been challenged to find effective solutions for stimulating horizontal wells, particularly in carbonates. One approach has been to re-evaluate expensive cased cemented completions that might allow effective options for future horizontal wells, as well as finding newer, more beneficial stimulation techniques that can be effectively used for these preperforated uncemented liner completions. The best solution may be to combine these approaches by providing production from the far field sector through fractures, and production from near-wellbore areas through the large open wellbore skin.As with vertical wells, underachieving wells are commonplace in horizontal completions. Many things, such as unexpectedly low permeabilities in the area can cause this situation. Underachieving horizontal wells are often attributable to either permeability anisotropy (especially vertical permeability limitations), skin damage, near-wellbore plugging of a natural fracture network, or ineffective stimulation techniques.[1–6]Ineffective stimulation techniques can result in underachievement in openhole horizontal wells, and more so, in wells completed using slotted or preperforated liners. The latter could even be deemed "unstimulatable" when conventional fracture-type stimulation techniques are being considered. Matrix-type stimulation or wellbore wall-cleaning techniques are likely the only viable solutions for production enhancement in these types of wells. For moderate- to high-permeability reservoir applications, hydrajetting coupled with "squeeze" techniques (below fracturing pressures), has proven to be a very beneficial production enhancement process.[7,8] Unfortunately, permeability anisotropy along the horizontal section becomes a serious problem to this technique. Keywords: hydrajet-fracturing process, operator, horizontal completion, implementation, directional drilling, lateral, society of petroleum engineers, spe 94706, liner, application Subjects: Drilling Operations, Hydraulic Fracturing, Directional drilling This content is only available via PDF. 2005. Society of Petroleum Engineers You can access this article if you purchase or spend a download.