Block 29/11, Pearl River Basin, Offshore China; Source: Empyrean

Results from a seismic inversion evaluation for Empyrean’s Jade and Topaz prospects, situated in Block 29/11 within the Pearl River Mouth Basin, offshore China, gave Empyrean confidence it has a world-class carbonate reservoir with wonderful porosity and permeability at each prospects.

Block 29/11 is a big block – 1806 sq. kilometres – situated within the prolific Pearl River Mouth Basin, roughly 200km southeast of Hong Kong.

Empyrean is the operator with 100 per cent of the exploration rights of the allow in the course of the exploration part of the venture. In the occasion of a industrial discovery, CNOOC could have a again in proper to 51 per cent of the allow.

Empyrean Energy on Thursday introduced the outcomes of its seismic inversion venture, designed to evaluate the reservoir high quality and reservoir rock composition at its Jade and Topaz prospects at Block 29/11.

As beforehand reported, the corporate engaged China Offshore Services Limited (COSL) to hold out knowledge processing and technical work for the seismic inversion venture.

Following this, the corporate has undertaken an in depth evaluation and evaluation of the dataset.

‘Excellent high quality carbonate reservoir’

The firm on Thursday reported that complete evaluation of the seismic inversion knowledge has now been accomplished, and validates the interpreted presence of wonderful high quality carbonate reservoir facies at each the Jade and Topaz prospects with porosities interpreted to be in a extremely beneficial vary of 20-30 per cent.

The principal purpose of the seismic inversion venture was complete reservoir characterisation, with explicit give attention to the Jade and Topaz prospects, by combining current effectively log knowledge with 3D seismic knowledge to generate an acoustic impedance dataset.

Analysis of this nature has been used to efficiently interpret the bodily rock properties of reservoirs globally – specifically lithology, porosity and thickness of reservoir.

In order to attain essentially the most complete and sturdy outcome from the Seismic Inversion Project, the Company approached China National Offshore Oil Corporation (CNOOC) to realize entry to the log knowledge of a vital effectively, LH-23-1-1d, situated roughly 12 km southwest of the Jade prospect in a allow operated by CNOOC.

CNOOC agreed to offer the info, leading to elevated technical confidence within the outcomes of the seismic inversion venture. The LH-23-1-1d effectively intersected each carbonate and sandstone reservoirs with oil pay.

In order to mix effectively log knowledge with the 3D seismic knowledge, the corporate labored carefully with the COSL workforce.

During this course of, effectively knowledge from the LH-23-1-1d effectively proved essential in establishing the shut relationship of impedance knowledge extracted from the seismic knowledge to the lithology, porosity and thickness of reservoir in current wells.

Comprehensive and systematic evaluation of the acoustic impedance dataset resulted in separating Zhujiang carbonate facies from the underlying Zhuhai sandstones facies.

In addition, the lateral distribution of high-quality carbonate reservoir has been mapped. This extra detailed work validates the sooner interpretation from seismic thickness evaluation and helps the interpreted presence of a thick carbonate reservoir with porosities in a spread of 20-30 per cent on the Jade and Topaz prospects.

Empyrean CEO, Tom Kelly, said: “The seismic inversion evaluation has tremendously enhanced our interpretation and offers us additional confidence that we now have a world-class carbonate reservoir with wonderful porosity and permeability at each the Jade and Topaz prospects.

These prospects are technically able to be drilled and we’ll work exhausting to make sure they characteristic in a recovering oil market. The wonderful relationship and cooperation with COSL and CNOOC has as soon as once more been demonstrated by entry to essential effectively knowledge”.

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