Fracture Gradient Prediction And Its Application In Oilfield Operations Pdf

  • and pdf
  • Saturday, May 15, 2021 1:02:42 PM
  • 0 comment
fracture gradient prediction and its application in oilfield operations pdf

File Name: fracture gradient prediction and its application in oilfield operations .zip
Size: 24799Kb
Published: 15.05.2021

Fracture gradient prediction: an overview and an improved method

Ahmed, A. December 8, Energy Resour. March ; 3 : Several correlations are available to determine the fracture pressure, a vital property of a well, which is essential in the design of the drilling operations and preventing problems.

The fracture gradient is a critical parameter for drilling mud weight design in the energy industry. A new method in fracture gradient prediction is proposed based on analyzing worldwide leak-off test LOT data in offshore drilling. Current fracture gradient prediction methods are also reviewed and compared to the proposed method. We analyze more than LOT data in several offshore petroleum basins and find that the fracture gradient depends not only on the overburden stress and pore pressure, but also on the depth. The data indicate that the effective stress coefficient is higher at a shallower depth than that at a deeper depth in the shale formations. Based on this finding, a depth-dependent effective stress coefficient is proposed and applied for fracture gradient prediction.

Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. DOI: Liang Published Engineering. The present deterministic pore pressure and fracture gradient prediction techniques simplify the input variables from a statistical range of data to a deterministic value, thereby producing over-simplified deterministic pore pressure and fracture gradient results. As a consequence, we lose the ability to quantitativel y analyze risks, and we cannot quantify the uncertainties of our pore pressure and fracture gradient prediction.

Application of artificial neural network in fracture pressure prediction

This invention is in the field of hydrocarbon well planning, and is more particularly directed to the determination of pore pressure and fracture gradient profiles at locations where hydrocarbon wells may be drilled. In the field of oil and gas production, the design of new wells has become a critical factor in minimizing drilling cost and in ensuring successful production. Proper well planning includes such factors as the weight of the drilling mud to be used during the drilling operation, and the necessity for and design of casing strings. The selection and planning of mud weight and casing depend primarily upon the pore pressure of fluid bearing formations below the surface of the earth. On one hand, the drilling mud weight cannot exceed the pressure at which a formation will fracture. Fracture of the formation at the wellbore can cause loss of circulation of the drilling mud, since the mud can escape from the wellbore into the surrounding lithology. Accordingly, low pressure zones that are vulnerable to such fracturing must be detected, and the appropriate precautions taken, so that such fracturing and loss of mud circulation does not occur.

Eaton, Ben A. Continental Oil Co. October, — OnePetro. In arriving at a new method of predicting formation fracture gradients, it was found that overburden load, Poisson's ratio for rocks, and pressure gradients vary with depth. Although the method was developed specifically for the Gulf Coast, it should be highly reliable for all areas, provided that the variables reflect the conditions in the specific area being considered. The subject of many discussions and technical papers in the last 20 years has been the prediction of the wellbore pressure gradients that are required to induce or extend fractures in subsurface formations.

Eaton, Ben A.. In arriving at a new method of predicting formation fracture gradients, it was found that overburden load, Poisson's ratio for rocks, and pressure gradients vary with depth. Although the method was developed specifically for the Gulf Coast, it should be highly reliable for all areas, provided that the variables reflect the conditions in the specific area being considered. The subject of many discussions and technical papers in the last 20 years has been the prediction of the wellbore pressure gradients that are required to induce or extend fractures in subsurface formations. The subject merits this attention because of the frequently recurring problems that arise from an inability to predict fracture pressure gradients.


Fracture Gradient Prediction and Its Application in Oilfield Operations In arriving at a new method of predicting formation fracture gradients, it was found that overburden load, Poisson's ratio for rocks, This content is only available via PDF.


Application of Quantitative Risk Analysis to Pore Pressure and Fracture Gradient Prediction

AIME supports its four Member Societies through the conferring of awards, scholarships and special grants. And, as one of the five Founder Societies of engineering , AIME provides its Member Societies with national visibility and representation within the larger engineering and scientific community. Connecting minerals, metals, and materials scientists and engineers working in industry, academia, and government from around the world.

Prediction of formation fracture pressure is an essential task in designing safer drilling operations and economical well planning, allowing effective control, operation and stimulation. Errors in fracture pressure prediction can lead to several serious problems such as lost circulation and kick, and even blowout. This paper presents an overview on application of artificial intelligent in the petroleum industry. The results obtained from the model are compared with those obtained from conventional method. The comparison shows that the ANN method is promising and under some circumstances it is superior to the available techniques.

Сьюзан это выводило из себя, однако она была слишком самолюбива, чтобы пожаловаться на него Стратмору. Проще было его игнорировать. Хейл подошел к буфету, с грохотом открыл решетчатую дверцу, достал из холодильника пластиковую упаковку тофу, соевого творога, и сунул в рот несколько кусочков белой студенистой массы.

Fracture Gradient Prediction and Its Application in Oilfield Operations

Стратмор вздохнул. - Оставь эти штучки детям, Грег. Отпусти .

Application of Quantitative Risk Analysis to Pore Pressure and Fracture Gradient Prediction

Фонтейн пришел к выводу, что Стратмор в полном порядке, что он трудится на сто десять процентов, все так же хитер, умен и в высшей степени лоялен, впрочем - как. Лучшее, что мог сделать директор, - не мешать ему работать и наблюдать за тем, как коммандер творит свое чудо. Стратмор разработал план… и план этот Фонтейн не имел ни малейшего намерения срывать. ГЛАВА 75 Пальцы Стратмора время от времени касались беретты, лежавшей у него на коленях.

Минуту он наслаждался полной темнотой. Сверху хлестала вода, прямо как во время полночного шторма. Стратмор откинул голову назад, словно давая каплям возможность смыть с него вину. Я из тех, кто добивается своей цели. Стратмор наклонился и, зачерпнув воды, смыл со своих рук частицы плоти Чатрукьяна. Его мечта о Цифровой крепости рухнула, и он полностью отдавал себе в этом отчет. Теперь у него осталась только Сьюзан.

 - Буду у своего терминала. - Как ты думаешь, сколько времени это займет. - Ну… - задумалась Сьюзан.  - Это зависит от оперативности, с которой ARA пересылает почту. Если адресат находится в Штатах и пользуется такими провайдерами, как Америка онлайн или Компьюсерв, я отслежу его кредитную карточку и получу его учетную запись в течение часа. Если он использует адрес университета или корпорации, времени уйдет немного.  - Она через силу улыбнулась.


1 Overburden stress gradi- ent, formation pore pressure gradient and Poisson's ratio of rocks were the independent variables that were shown to control fracture​.


0 Comments