...Youjie Xu; Xiang Zuping; Mengnan Yu Summary Vertical hydraulic fracturing is widely used to develop low-permeability gas reservoirs. Uneven distribution of formation permeability and stress leads to multiple-wing hydraulic fractures with different lengths, which results in the wellbore not being...

...Brenda Azuara Diliegros; Roberto Aguilera Summary This paper examines the buildup (BU) pressure response of a vertical well that penetrates an unconventional tight naturally fractured carbonate reservoir in Mexico. Four BUs in the same well over a period of 4 months, with intermediate flow periods...

...Ahmed N. Al-Dujaili; Mehdi Shabani; Mohammed S. Al-Jawad Summary This study considered the complexity of Mishrif geology and its effect on fluid movement within and across Mishrif reservoir intervals. For this purpose, we analyzed the following items: the multiple interval communication with high...

...Shehadeh Masalmeh; S. Amir Farzaneh; Mehran Sohrabi; M. Saeid Ataei; Muataz Alshuaibi Summary Gas injection is the most widely applied recovery method in light, condensate, and volatile oil carbonate reservoirs. Gas has high displacement efficiency and usually results in a low residual oil...

... development cycle, chemical flooding can become a potential avenue to accelerate oil production in secondary oil recovery mode. This makes it different from onshore chemical flooding processes that mostly focus on enhanced oil recovery in mature or maturing reservoirs. The advancements in offshore chemical...

...J. L. F. B. Neto; S. Pesco; A. B. Barreto Jr Summary An injectivity test consists of continuously injecting a phase (water or gas) into an oil-saturated reservoir during a period. According to the analysis of the wellbore pressure behavior, this procedure estimates reservoir parameters...

...Zhenyu Guo; Sathish Sankaran; Wenyue Sun Summary Efficient reservoir models are more desirable for fast-paced reservoir management. Moreover, due to the complexity of flow underground, it is also essential to capture the fundamental physics for model reliability. Although they are fast, pure data...

...Tim Bozeman; Will Nelle; Quoc Nguyen Summary Low primary and secondary recoveries of original oil in place from modern unconventional reservoirs beg for utilization of tertiary recovery techniques. Enhanced oil recovery (EOR) via cyclic gas injection (“huff ‘n’ puff”) has indeed enhanced the oil...

...N. Alimohammadi; M. Pooladi-Darvish; B. Rostami; M. Khosravi Summary Many of the naturally fractured carbonate reservoirs of the Middle East exhibit low natural-depletion recoveries. The reason is that most of their oil reserves are stored in the low-permeability host rocks and are left behind...

...Jose Antonio Gonzalez Guevara; Silvia Maria Chavez Morales; Thalia Iveth Hernandez Hernandez; Heron Gachuz-Muro; Bruno A. Lopez Jimenez Summary Sixty billion barrels of oil still reside in the matrix of mature onshore and offshore Mexican reservoirs located in the southeast basins after primary...

... of this paper is that air injection into a reservoir introduces a large amount of nitrogen that is detrimental to the displacement of oil, and oil recovery yet offers few, if any, advantages. Reducing the amount of noncondensable gas (NCG) associated with the process can be done mainly in two ways—by using...

...Y. Wang; X. R. Zhao; K. X. Li Summary Natural gas production in the Sichuan Basin reached 30 × 10 9 m 3 in 2020, but the shortfall between this and the production goal of 50 × 10 9 m 3 in 2025 requires further exploration. The complex mineralogy and low porosity in tight carbonate reservoirs reduce...

...Bing Wei; Mengying Zhong; Lele Wang; Jinyu Tang; Dianlin Wang; Junyu You; Jun Lu Summary When reservoir fluids are confined by nanoscale pores, pronounced changes in fluid properties and phase behavior will occur. This is particularly significant for the natural gas huff ‘n’ puff (HNP) process...

... by injecting lean gas is essential for concurrent gas cap-oil rim development. Reservoir heterogeneity aggravates lean gas override causing preferential movement of lean gas plume. Thus, it is important to track lean gas plume while recycling and understanding the breakthrough potential of lean gas. This paper...

...S. Hamed Tabatabaie; Hamid Behmanesh; Louis Mattar Summary In order to properly conduct material balance calculations, the wells must be producing from the same reservoir. Identification and grouping of wells in a common reservoir can be a challenging task. Based on the flowing material balance...

... produced in 11 years. Mangala was put on full field polymer flood in 2015, 6 years after the start of field production on waterflood in 2009. Polymer flood added nearly 93 million barrels above the anticipated waterflood recovery in 6 years. Reservoir simulation models could replicate the initial Mangala...

...Leding Du; Yuetian Liu; Liang Xue; Guohui You Summary Oilfield development performance prediction is a significant and complex problem in oilfield development. Reasonable prediction of oilfield development performance can guide the adjustment of the development plan. Moreover, the reservoir...

...Micheal Oguntola; Rolf Lorentzen Summary Over the last decades, the development of different oil reservoirs with gas or chemical enhanced oil recovery (EOR) methods have been studied, and the EOR effects of the recovery methods are found to be sensitive to fluid and rock properties...

.... In general, IH is considered to be less practicable than LFH and HFH. The resistance (ohmic or conduction) heating prevails in LFH while dielectric heating prevails in HFH. Thus, the effectiveness of LFH decreases if reservoir water is overheated to generate steam. Also, the intensity of the energy released...

...Shaoqing Sun; David A. Pollitt Summary Benchmarking the recovery factor and production performance of a given reservoir against applicable analogs is a key step in field development optimization and a prerequisite in understanding the necessary actions required to improve hydrocarbon recovery...