Comprehensive analysis of initiation and propagation pressures in drilling induced fractures

Razavi, Omid; Vajargah, Ali Karimi; Oort, Eric van; Aldin, Munir

doi:10.1016/j.petrol.2016.10.039

Cited by 21 publications

(8 citation statements)

References 24 publications

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“…(4) In 0.2 and 0.16 inch-width fractures, controlling the lost circulation of heavy-weight mud was harder than controlling the lost circulation of oil-based mud. (5) The eld test results demonstrated that a blend of RIPI-LQ and X1-Seal were well capable of controlling the lost circulation of different types of drilling uids.…”

Section: Resultsmentioning

confidence: 96%

“…3,4 Lost circulation causes several problems, such as the loss of several barrels of drilling uids, increase in the non-productive rig time, loss in the wellbore, and in some cases even blowouts. 5,6 It is also blamed for the excessive caving of formations, which in turn results in cement job problems and reduces the effective permeability of the near wellbore region. The excessive cost of these types of problems is many million dollars annually.…”

Section: Introductionmentioning

confidence: 99%

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Application of new eco-friendly LCMs for combating the lost circulation in heavy-weight and oil-based mud

2018

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Application of new eco-friendly LCMs for combating the lost circulation in heavy-weight and oil-based mud

2018

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“…This may delay water coning in water drive reservoirs. The studies have been proved that critical production rate of horizontal wells is 3-20 times greater than that of vertical wells (Giger, 2013;Shahbazi et al, 2016;Razavi et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…However, they are seriously employed since 1980. Horizontal wells are used in oil production from reservoirs with low thickness, naturally fracture reservoir, formations with the risk of water or gas coning, heavy oil reservoirs and low permeable gas reservoirs (Dietz, 1975;Elgibaly et al, 2016;Wang et al, 2016;Razavi et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Simulation study of controlling water coning in oil reservoirs through drilling of horizontal wells

Dabiri¹,

Karaei²,

Azdarpour³

2017

Biosci. Biotech. Res. Comm

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Oil production is affected by the reservoir pressure, where the higher the reservoir pressure, the higher the production rate. In most cases, water is also produced with oil, which can cause several negative issues. In oil wells, after a short period of oil production, early water production will cause serious decrease in oil production. Actually water coning is an event in which water and oil surfaces will move simultaneously to the well perforation. This event, if occurs in a well, will affect the well production and will increase the costs. Consequently, the production life of the well will be shortened. This paper presents the results of simulation study of an under saturated oil reservoir with no primary gas cap present in the reservoir with oil API gravity of 35. The feasibility of water coning remedy through drilling new horizontal and vertical wells was investigated using ECLIPSE software. The simulation results showed that water production rate is increased with increasing the oil production rate from the reservoir. In addition, water coning was signifi cantly reduced with drilling new horizontal and vertical wells. However, horizontal wells found to be more effective than the vertical wells. The oil production rate increased with horizontal wells while water production rate decreased signifi cantly.

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“…With the development of oilfield exploration and development, the formation pressure decreases rapidly and circulation loss of the workover fluid is serious [1][2][3][4]. Previously, many plugging methods were used to prevent the plug leaks, such as oil-soluble resin [5,6], composite shielding temporary plugging [7][8][9][10], gel plugging agent [11], and microbubble workover fluid [12]. However, oil-soluble materials are greatly affected by temperature, so they are easy to get stuck in the pipe string due to equipment failure, temporary stop of workover operation, and other reasons, and the recovery time of oil output of most wells is very long.…”

Section: Introductionmentioning

confidence: 99%

A self-breaking supramolecular plugging system as lost circulation material in oilfield

Zhang

Jiang

2020

Open Chemistry

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AbstractLost circulation is a frequently encountered problem during workover operations of a low-pressure reservoir. Many lost circulation materials (LCM) have been used to solve the problem, but various disadvantages still exist, for example, oil-soluble materials are easy to get stuck in the pipe string as the temperature drops and gel time and gel strength of the cross-linking gel systems are difficult to control in the occasion of inadequate stirring. A self-breaking supramolecular plugging system used to control lost circulation of workover operations is developed, and it can encounter the aforementioned disadvantages of the traditional LCM. The system forms a space grid structure by non-covalent bonds between the molecules without adding a cross-linking agent. Sand beds plugged with the supramolecular plugging system had a pressure bearing capacity of 4.5 MPa. The self-breaking rate of the supramolecular system was 100% after 7 days at a temperature of 120°C. The core permeability recovery of the self-breaking liquid was 91.9%, indicated that the plugging system is compatible of the reservoir. The supramolecular plugging system has been used in four wells in the Jidong oilfield of East China. Field practice showed that the supramolecular LCM can effectively control lost circulation at different rates during workover operations. The increase in the daily fluid after operations indicated that the slurry has not damaged the reservoir.

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Comprehensive analysis of initiation and propagation pressures in drilling induced fractures

Cited by 21 publications

References 24 publications

Application of new eco-friendly LCMs for combating the lost circulation in heavy-weight and oil-based mud

Application of new eco-friendly LCMs for combating the lost circulation in heavy-weight and oil-based mud

Simulation study of controlling water coning in oil reservoirs through drilling of horizontal wells

A self-breaking supramolecular plugging system as lost circulation material in oilfield

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