Effective Technology to Fix Horizontal Wells with a Liner for Subsequent Development by the P&P Method

Mapping Intimacies ◽

10.2118/208540-ms ◽

2021 ◽

Author(s):

Dzmitry Paroshyn ◽

Leliauski Siarhei ◽

Pilipchuk Dzianis ◽

Palaheyenka Uladzimir

Keyword(s):

Hydraulic Fracturing ◽

Elastic Properties ◽

Oil Recovery ◽

Salt Water ◽

Subsequent Development ◽

Production Association ◽

Cement Stone ◽

Technological Challenge ◽

The Impact

Abstract Summary One of the priority directions of technological development of RUE "Production Association" Belorusneft "is the involvement in the development of unconventional oil reserves and enhanced oil recovery. Achievement of this goal was hampered by such a technological challenge in the field of well construction, as providing reliable support for a well with an extended horizontal completion during development by the P&P method. The essence of the challenge was that when performing a cluster or multi-stage hydraulic fracturing, increased loads are created on the well support, which can violate its isolation. The complexity of the geological and technical conditions in the Pripyat trough lies in the large length of horizontal ends in salinized carbonate reservoirs and high hydraulic fracturing pressures during well development. The article discusses solutions for the design and creation of a reliable cement sheath for the given geological and technical conditions. To overcome the technological challenge, a cementing technology was developed, including a plugging slurry formulation with elastic properties of a cement stone and a casing rotation technology during the cementing process. The plugging slurry formulation was developed with the elastic properties of a cement stone with cement mixing in salt water, adapted to the conditions of the salinized rocks of the Pripyat trough. To develop the formulation, the simulation of the pressure effect during the development by the P&P method on the cement stone behind the casing was used, as well as the simulation of the process of displacement of the drilling mud by the plugging slurry. The technology was successfully tested at five sites when horizontal wellbores were fastened with 114 mm tie-back casings, while high cementing quality indicators were achieved. The lengths of the tie-back casings ranged from 509 to 1000 m. The article presents the results of assessing the quality of cementing using acoustic cementometry and assessing the density of the medium behind the casing by gamma-gamma cementometry, as well as comparing the quality of cementing with casing rotation and without rotation, before and after the impact of P&P development. In RUE "Production Association" Belorusneft "it was decided to use the developed technology in default for attaching 114 mm liners with subsequent development using the P&P method.

Download Full-text

Distribution of saline and freshwater in groundwater in Thai Binh province and solution for reasonable exploitation

Journal of Vietnamese Environment ◽

10.13141/jve.vol6.no2.pp120-125 ◽

2014 ◽

Vol 6 (2) ◽

pp. 120-125

Author(s):

Thi Thanh Thuy Tran ◽

Van Lam Nguyen ◽

Huu On Dang

Keyword(s):

Groundwater Quality ◽

Fresh Water ◽

Salt Water ◽

Research Result ◽

Distribution Area ◽

Groundwater Exploitation ◽

Research Results ◽

Pleistocene Aquifers ◽

The Impact

Thai Binh is a coastal province of Red River Delta in Vietnam, having administrative boundaries at the river systems and coastlines that cause groundwater quality varies complicatedly. Today in Thai Binh province, the groundwater in Holocene and Pleistocene aquifers is exploited for domestic use. But, beside the quality of groundwater in this region is not uniform, it is interspersed between salt water and fresh water zones in Holocene and Pleistocene aquifers. Nowaday, under the force of groundwater exploitation activity for domestic purposes, agricultural activities, the impact of climate change and sea level rise issues, the quality of distribution of groundwater here change. According to the recent research results, groundwater quality and distribution of salt water - fresh water there have many changes compared with the research results of the Northern Division for Water resources Planning and Investigation in the year 1996. For the the Holocene aquifer (qh), distribution area of salt water zone has been narrowed. Besides, saline cleaning process occurred in some coastal areas in Tien Hai, Thai Thuy and a part of Quynh Phu district. For the Pleistocene aquifer (qp), compared with research result in 1996, the boundaries between saline and fresh water at the present time is not change so much. By assessing the status of the distribution of saline and fresh water zones in groundwater in Thai Binh and the movement of this boundary, author’s research results will be the basis that helps the managers give out reasonable exploiting and sustainable using methods for these natural resources. Thái Bình là một tỉnh ven biển thuộc vùng châu thổ sông Hồng của Việt Nam, được bao bọc bởi hệ thống sông biển khép kín làm cho chất lượng nước ngầm biến đổi rất phức tạp. Hiện nay, tại Thái Bình có 2 tầng chứa nước chính phục vụ ăn uống sinh hoạt là tầng chứa nước Holocen và tầng chứa nước Pleistocen. Tuy nhiên, chất lượng nước ngầm ở các tầng chứa nước này không đồng đều, có sự phân bố xen kẽ giữa các khoảnh nước mặn và nước nhạt. Hiện nay, dưới tác động của hoạt động dân sinh, sản xuất nông nghiệp, khai thác nước phục vụ sinh hoạt cùng ảnh hưởng của biến đổi khí hậu và sự dâng cao của mực nước biển đã làm thay đổi chất lượng và quy mô phân bố nước ngầm khu vực. Theo những kết quả nghiên cứu mới nhất của tác giả cho thấy diện tích phân bố của các vùng nước mặn - nước nhạt của các tầng chứa nước trên địa bàn tỉnh đã có nhiều thay đổi so với kết quả nghiên cứu trước đây của Liên đoàn Địa chất thủy văn – Địa chất công trình miền Bắc năm 1996. Với tầng chứa nước Holocen, diện tích phân bố các khoảnh nước mặn bị co hẹp và đang có sự nhạt hóa tại một số khu vực ven biển thuộc Huyện Tiền Hải, Thái Thụy và một phần thuộc huyện Quỳnh Phụ. Trong tầng chứa nước Pleistocen (qp), so với kết quả nghiên cứu năm 1996, ranh giới mặn – nhạt tại thời điểm hiện tại đã có sự thay đổi nhưng không lớn. Kết quả nghiên cứu này là cơ sở giúp các nhà quản lý đề xuất giải pháp, phân vùng khai thác và sử dụng hợp lý nguồn tài nguyên thiên nhiên này đặc biệt trước tình trạng khan hiếm nước như hiện nay trên địa bàn tỉnh Thái Bình.

Download Full-text

Powder concretes with technogenic materials

Vestnik MGSU ◽

10.22227/1997-0935.2015.11.101-109 ◽

2015 ◽

pp. 101-109 ◽

Cited By ~ 7

Author(s):

Aleksandr Dmitrievich Tolstoy ◽

Valeriy Stanislavovich Lesovik ◽

Liliya Khasanovna Zagorodnyuk ◽

Irina Aleksandrovna Kovaleva

Keyword(s):

Concrete Structure ◽

High Strength Concrete ◽

Raw Materials ◽

High Strength ◽

Cement Stone ◽

Strength Concrete ◽

Scientists And Engineers ◽

The Impact

Beginning with the 1970s many specialists have been dedicating their works to investigation of the possibility to use concrete modifications of non-organic materials containing amorphous silica. Almost any industrial product is beginning with raw materials obtained from the planetary interior or formed on its surface. That’s why the problem of selective choice and utilization of industrial waste is of a global character, so it is of great importance. Currently, the attention of scientists and engineers is attracted by the widespread use of high-strength concrete, different from the usual one by high content of cement stone, lesser grain size, multi-component, increased specific surface area of the filler. The performance properties of concrete to a large extent depend on the properties of aggregate and water content. It is known that empirical way to search for improving the strength of concrete has always been a laborious and time-consuming. In this regard, the actual conditions for forming a preliminary study of high-strength concrete structure have been investigated, as well as the role of processing methods in the process and nature of the impact on the quality of a concrete structure.

Download Full-text

Self-Compassion and Quality of Life in Adults Who Stutter

American Journal of Speech-Language Pathology ◽

10.1044/2020_ajslp-20-00055 ◽

2020 ◽

Vol 29 (4) ◽

pp. 2097-2108

Author(s):

Robyn L. Croft ◽

Courtney T. Byrd

Keyword(s):

Quality Of Life ◽

Social Connectedness ◽

The Self ◽

Future Research ◽

Self Compassion ◽

Adults Who Stutter ◽

And Gender ◽

Relationship Of ◽

The Impact

Purpose The purpose of this study was to identify levels of self-compassion in adults who do and do not stutter and to determine whether self-compassion predicts the impact of stuttering on quality of life in adults who stutter. Method Participants included 140 adults who do and do not stutter matched for age and gender. All participants completed the Self-Compassion Scale. Adults who stutter also completed the Overall Assessment of the Speaker's Experience of Stuttering. Data were analyzed for self-compassion differences between and within adults who do and do not stutter and to predict self-compassion on quality of life in adults who stutter. Results Adults who do and do not stutter exhibited no significant differences in total self-compassion, regardless of participant gender. A simple linear regression of the total self-compassion score and total Overall Assessment of the Speaker's Experience of Stuttering score showed a significant, negative linear relationship of self-compassion predicting the impact of stuttering on quality of life. Conclusions Data suggest that higher levels of self-kindness, mindfulness, and social connectedness (i.e., self-compassion) are related to reduced negative reactions to stuttering, an increased participation in daily communication situations, and an improved overall quality of life. Future research should replicate current findings and identify moderators of the self-compassion–quality of life relationship.

Download Full-text

Surgery for Lung Cancer and the Consequences for the Swallow

Perspectives of the ASHA Special Interest Groups ◽

10.1044/persp1.sig13.162 ◽

2016 ◽

Vol 1 (13) ◽

pp. 162-168

Author(s):

Pippa Hales ◽

Corinne Mossey-Gaston

Keyword(s):

Lung Cancer ◽

Treatment Options ◽

Vocal Cord Palsy ◽

Subsequent Treatment ◽

Physiological Reserve ◽

Palliative Phase ◽

And Function ◽

The Impact ◽

Swallow Function

Lung cancer is one of the most commonly diagnosed cancers across Northern America and Europe. Treatment options offered are dependent on the type of cancer, the location of the tumor, the staging, and the overall health of the person. When surgery for lung cancer is offered, difficulty swallowing is a potential complication that can have several influencing factors. Surgical interaction with the recurrent laryngeal nerve (RLN) can lead to unilateral vocal cord palsy, altering swallow function and safety. Understanding whether the RLN has been preserved, damaged, or sacrificed is integral to understanding the effect on the swallow and the subsequent treatment options available. There is also the risk of post-surgical reduction of physiological reserve, which can reduce the strength and function of the swallow in addition to any surgery specific complications. As lung cancer has a limited prognosis, the clinician must also factor in the palliative phase, as this can further increase the burden of an already compromised swallow. By understanding the surgery and the implications this may have for the swallow, there is the potential to reduce the impact of post-surgical complications and so improve quality of life (QOL) for people with lung cancer.

Download Full-text