Ankleshwar

Location

The Ankleshwar oil field is located in the Cambay basin in Gujarat, India. This region is known for its rich hydrocarbon reserves and has been a major focus area for ONGC's exploration and production activities.

Discovery and History

The Ankleshwar oil field was one of the early discoveries made by ONGC. The field was discovered in the early 1960s, shortly after ONGC's inception. This discovery was instrumental in establishing the Cambay basin as a significant oil province in India.

Geology

The Ankleshwar oil field is part of the Cenozoic hydrocarbon-bearing anticline of the deltaic region. It is characterized by complex geological structures that require advanced exploration and production techniques.

Operations

The Ankleshwar asset is one of the key onshore oil fields operated by ONGC. The field involves extensive drilling and production activities. Here are some key aspects of the operations:

• Drilling and Production: ONGC has been involved in continuous development drilling to maintain and enhance production from the field. For instance, there are projects aimed at extracting oil and gas from multiple wells within the Aliabet Oil Field, which is part of the Ankleshwar asset. A recent project involves drilling four wells with an estimated cost of Rs. 1564 million.
• Environmental Clearance: The project has obtained necessary environmental clearances for onshore development and production from 104 wells in various blocks within the region.

Enhanced Oil Recovery (EOR)

Given the mature nature of the field, ONGC has implemented various Improved Oil Recovery (IOR) and Enhanced Oil Recovery (EOR) schemes to maintain production levels. One proposed method includes CO2 injection to enhance oil recovery from the Ankleshwar oil field.

Infrastructure and Investments

The operations at Ankleshwar are supported by significant investments in infrastructure. ONGC has built and operates various facilities, including pipelines, drilling rigs, and surface facilities, to support the extraction and processing of hydrocarbons from the field.

Economic Impact

The Ankleshwar oil project contributes significantly to India's oil and gas production. Despite the global decline in production from mature fields, ONGC's efforts at Ankleshwar have helped in sustaining production levels, which is crucial for India's energy security and economic growth.

In summary, the Ankleshwar oil project is a vital component of ONGC's operations, contributing to India's hydrocarbon production through continuous exploration, drilling, and production activities, supported by advanced recovery techniques and significant infrastructure investments.