Download or read book Laboratory Tests to Evaluate and Study Formation Damage with Low density Drill in Fluids LDDIF for Horizontal Well Completions in Low Pressure and Depleted Reservoirs written by Guoqiang Chen and published by . This book was released on 2002 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluating Formation Damage by Well Test Analysis written by Hunar Haias and published by LAP Lambert Academic Publishing. This book was released on 2015-07-09 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The big problem faces oil company when it produces from the well is a formation damage as a result of pore space of formation is blocked front of wellbore for flowing by drilling fluid invaded the formation while drill the well. Therefore it needs to remove the damage by acidizing operation and treat the invasion zone. Although the acidizing operation has disadvantage if the amount of acid that is pumped is higher than the required volume which leads to increase the formation damage instead of treatment. Therefore, it is important to determine the amount of acid required by known the distance of damage inside the formation which is define as the radius of skin damage, according this radius of formation damage will be easy to limit the volume of acid required to avoid more formation damage.Well test analysis is the method used to determine Formation damage for solve and treat the damage accordingly.
Download or read book Recommended Practice Standard Procedure for Laboratory Testing Drilling Fluids written by American Petroleum Institute. Production Department and published by . This book was released on 1990 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Formation damage in horizontal wells written by Bimal Thomas and published by . This book was released on 1997 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Some Aspects of Deep Formation Testing written by Soraya Sofia Betancourt and published by . This book was released on 2012 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Single-probe formation testers have been used since the 1950s to measure pore pressure and estimate mobility in fluid-bearing formations penetrated by a well. They are widely used in the oil and gas industry, with tens of measurements often made in every newly drilled well as part of the formation evaluation program. Each measurement consists of placing the tool in the wellbore in direct contact with the face of the formation, extracting a small amount of fluid (from 1 to 50 cc) from the rock and analyzing the fluid pressure response of the system. Pressure interpretation is based on models that assume that temperature within the formation tester flowline remains constant during the tool operation. However, formation pressure measurement involves relatively fast volume and pressure changes within the flowline, which result in temperature changes. These temperature changes are modeled semi-analytically and their effect on pressure transients is analyzed. Temperature variations are accounted for by describing the pressure and temperature dependence of fluid density in the continuity equation, and that temperature varies with both space and time. It is considered here that once a temperature change is imposed on the system, the primary mechanism of thermal transport to achieve equilibrium is conduction. Including temperature in the analysis requires taking into account flowline geometry, and well environmental conditions during the measurement-- namely, wellbore temperature and type of drilling fluid in the wellbore, all of which are immaterial in the isothermal analysis. Arguably, pressure behavior during formation tester measurements could be influenced by several factors. All previous studies related to formation testers assume perfect tool performance and provide explanations to pressure behaviors from the reservoir point of view (e.g., Stewart and Witmmann, 1979; Phelps et al., 1984; Proett and Chin, 1996, etc.). The approach followed here is diametrically opposite. The formation is considered `perfect' from the point of view of pressure measurement, and physical phenomena (thermal transients) that may affect the measured pressure signal are studied. The focus is to understand fundamental aspects of the tool performance that can be studied analytically while minimizing, as much as possible, external parameters that add uncertainty. This dissertation was motivated by inconsistencies observed between the pressure behavior in field measurements and existing (isothermal) theory. For instance, false buildups, buildup overshoots and long time required to reach pressure equilibration, have puzzled those involved in the interpretation of formation tester pressure transients for many years. These behaviors can be reproduced in pressure computations when accounting for temperature variations. The focus of this dissertation is on modeling the tool capability to sense pressure transients associated with recompression of formation fluids several inches away from the wellbore, accounting for temperature variations during the measurement. This is relevant because it is desirable to characterize formation properties beyond the region affected by drilling mud filtrate invasion. In practice, a discrepancy is often observed between formation mobility obtained from drawdown, which depends mostly on formation properties near the wellbore, and mobility obtained from the analysis of late-time buildup pressure, which in theory depends on formation properties farther from the wellbore (Moran and Finklea, 1962). This dissertation examines the influence of late-time tool storage effects caused by thermal equilibration of the flowline fluid on the pressure equilibration and buildup mobility interpretation. It was found that in some cases such late-time storage effects could exhibit a behavior that resembles that expected from spherical flow, that is, the flow regime characteristic of single-probe formation testers; and could therefore invalidate mobility determined by isothermal transient pressure analysis. Formation tester flowline and probe design, test parameters (rate and volume), and environmental conditions during the measurement, mostly type of drilling fluid and wellbore temperature, are important variables in determining the magnitude of late-time storage effects, and hence the tool capability to detect a deep formation signal (spherical flow). Temperature variations affecting late-buildup pressure transients were observed to be more pronounced (listed in order of importance): as wellbore temperature increases; drilling fluid is oil-based mud; flowline with large radius components (e.g.> 1 cm); large flowline volume; small probe radius (
Download or read book Cambridge International AS A Level Further Mathematics Coursebook written by Lee Mckelvey and published by Cambridge University Press. This book was released on 2018-08-31 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cambridge International AS & A Level Further Mathematics supports students following the 9231 syllabus. This single coursebook comprehensively covers all four modules of the syllabus and helps support students in their studies and develops their mathematical skills. Authored by experienced teachers of Further Mathematics, the coursebook provides detailed explanations and clear worked examples with practice exercises and exam-style questions. Answers are at the back of the book.
Download or read book Offbeat 1 written by Lonely Planet and published by . This book was released on 2022-09 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Avoid the crowds and discover 75 amazing places away from the tourist trail. Featuring practical planning information combined with vibrant photography and handy maps, Lonely Planet's Offbeat is a beautiful hardcover book that will inspire you to take the road less travelled and discover incredible experiences in under-the-radar destinations.
Download or read book Macabre 1 written by and published by . This book was released on 2020-10-27 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Macabre is a horror/fantasy short-stories novel written to entertain our senses and curiosity of the supernatural, paranormal, and mystical. You might have nightmares after reading Macabre or you might laugh. Either way, be prepared to be scared.
