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- W2005964343 abstract "Abstract Acid formulation design for well stimulation requires careful experimentation for quantitative and qualitative identification of different elements present in spent acid and also mineralogical analysis of core samples. In depth lithological studies, experienced personnel and long discussion sessions are a prerequisite for finalization of acid formulation for wells, which proves to be a time consuming process. Development of an intelligent program proves to be an effective and time saving process for acid formulation of wells. Just the input of experimental results would give the necessary acid formulation design for the well. The program has an in-built database and decision making intelligence, which is based on the basics of reservoir stimulation (Basics like McLeod's table). The software can also deal with some exceptional wells. With the application of the software, the acid formulation design is achieved in minutes rather than in hours. Thus, the software proves to be an effective tool for the Oil industry where effective time and money management are the key ingredients for success. Introduction Matrix stimulation treatments injected below fracturing pressure downtubing, drillpipe or coiled tubing usually includes a sequence of several fluids, referred to as stages. A minimal treatment consists of a preflush stage with a on damaging, nonreactive fluid to establish an injection rate, a stage of the main treating fluid and an overflush stage to clear the main treatment fluid out of the tubing and displace it into the near wellbore area. The aim of the software is to assist in quick formulation of treatment design for sandstones and carbonates. Quick and accurate solutions are an essential part in the development of smart fields and thus this program has been designed to facilitate this requirement. The main acid formulation is based on the type of formulation to be stimulated. Formulation guidelines are based on studies of acid mineral reaction chemistry. Formulating acids for carbonates is relatively simple because the majority of the reaction products are simply calcium chloride, water and carbon dioxide, which do not undergo further reactions. In addition, acids selected for carbonate acidizing must be compatible with the formation fluids. The sensitivity of a sandstone formation to a matrix treatment fluid depends on the mineralogy of the formation, damage type, reaction products, temperature and permeability. Moreover, for any matrix acid treatment to be effective or to achieve desired results, the acid composition is required to pass through following compatibility criteria: Thus, all these factors were considered while designing the program for acid formulation. Laboratory Studies While working at the well stimulation department, it was observed that acid formulation was consuming much time after the analysis of lab results. Thus, it was realized that a program for acid formulation could give quick acid design for stimulation job. Following lab studies were conducted, the results of which were entered into the program to achieve the desired acid formulation: Acid solubility test is conducted to know how much of the formation will be dissolved in a particular acid and to know if the acid reaction by-products will precipitate or not. Elemental analysis of spent acid solutions is used to determine the type of clays present in the sample. Elemental analysis is accompanied with laboratory core testing to study the mineralogy of the pay zone. Crude oil testing is necessary to know whether the crude will form sludge or not. The results of this test would help the software to determine the right additives or anti sludge chemicals." @default.
- W2005964343 created "2016-06-24" @default.
- W2005964343 creator A5001737500 @default.
- W2005964343 date "2007-03-31" @default.
- W2005964343 modified "2023-09-25" @default.
- W2005964343 title "A Program for Acid Formulation in Stimulation Jobs-Merging Oil field Chemistry and IT Towards Development of Smart Fields" @default.
- W2005964343 doi "https://doi.org/10.2118/106131-ms" @default.
- W2005964343 hasPublicationYear "2007" @default.
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