【ECF News】Summary of new technologies in major oil fields of PetroChina (1H 2019) - Part I

2019-08-09 Viewed:1488

Source:Energy China Forum

CNPC Daqing Oilfield Lishen Pumping

Technology: 120 degrees Celsius downhole sensor

Effect: The core technology of 120 degrees Celsius downhole sensor is analog electric current loop data transmission technology, which realizes the complete transmission of current signal to the ground, which can effectively solve the problem of signal attenuation and measurement distortion, and allows users to more clearly grasp the operation status of the well. The 120 degree Celsius downhole sensor has been applied in Daqing Oilfield, Jiangsu Oilfield, and Sudan 2/4 Oilfield, successfully breaking the monopoly of foreign competitors.

CNPC Xibu Drilling Engineering Company

Technology: Ultra Deep Well Cementing Technology

Effect: The company completed the 8882-meter casing cementing construction of Asia's deepest onshore well - Lunshen 1 Well, creating a record of deep and cementing operations for the 177.8 mm diameter casing in Asia.

CNPC Xibu Drilling Engineering Company

Technology: Unconventional small borehole sidetracking technology

Effect: Located in the Kelamei gas field of Xinjiang Oilfield, Dixi 171 well is the first large-angle ultra-small wellbore sidetracking directional gas well with unconventional small wellbore sidetracking. The project filled the domestic technical blanks at sidetracking construction, 3D ultra-small borehole sidetracking, critical drilling pressure control of the Carboniferous basalt gas layer drilling and the suppression of drilling fluids.

Jidong Oilfield

Technology: composite fracturing transformation

Effect: According to the characteristics of deep reservoir burial, special lithology and high construction pressure, Jidong Oilfield Drilling and Production Institute set targetted measures of composite fracturing reform: using pre-acid pressure to reduce construction pressure and dredge natural cracks; selecting high-temperature functional slick water carrying small-sized ceramsite to fill micro-cracks in middle section; filling main cracks with the jelly-filled sand in late stage.

PetroChina Houston Center

Technology: 70MPa full soluble bridge plug

Effect: The fully soluble bridge plug developed by the PetroChina Houston Technical Research Center and the Southwest Oil & Gasfield Comapny was successfully tested in the field at Wei 202H69-2 shale gas well. This indicates that the fully soluble bridge plug has a pressure of 70 MPa, stable seat sealing performance and excellent solubility. The operator's Great Wall Drilling Shale Gas Project Department gave a high evaluation and believed that the overall performance of the bridge plug reached the world's leading level.

China Petroleum Logging Company

Technology: Modular Clustering Perforator

Effect: The first domestic modular cluster perforator undertaken by the Southwest Branch of China Petroleum Logging Company successfully carried out field test application in Wei 204H69-4 well. The technology adopts a new modular contact design idea, which can optimize more than 80 parts of 3 cluster perforating guns into about 10 modules, and replace 15 connecting wires, completely achieving no wire operation. In the Wei 204H69-4 well, the modular clustering perforator was successfully tested in two sections with a total of 5 clusters. The highest test well pressure was 104.8 MPa and the well temperature was 113 °C.

Energy China Forum 2019 

the 9th Asia-Pacific Shale Gas & Oil Summit (Shanghai, China) 

Sept 25-27, 2019

Learn more about ECF2019 speakers & topics at http://2019en.energychinaforum.com

Disclaimer: The above content was edited by Energy China Forum (www.energychinaforum.com), please contact ECF before reproduce.

Author:Jeffrey    News Time:2019-08-09


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