The Upper Permian sedimentary successions of the southern Sydney Basin have been the subject of several stratigraphic, sedimentological, and petrographic studies and more recently several studies dating the sedimentary succession using U-Pb zircon and 40Ar-39Ar geochronology. In this study the Broughton Formation of the Lower Permian, part of the upper Shoalhaven Group succeeding the Talaterang Group and underneath the Illawarra Coal Measures was studied. The Broughton Formation is part of a Permian retroarc depositional basin within the Southern Sydney Basin (SSB) which is unconformable on the Lachlan Fold belt to south and west, and in tectonic contact with the New England Fold Belt to the north and east. The chronology of the Upper Permian of the SSB is well constrained. However, the chronology of the Lower Permian of the SSB, including the Broughton Formation, is less well constrained. Thus, there is debate over the timing and absolute length of several glacial and interglacial cyc
Here’s a roundup of the latest E&P headlines, including a field start up and a well drilled to a basin with record depth from the past week in the upstream oil and gas industry.
The quantitative identification of water sources is an important prerequisite for objectively evaluating the degree of aquifer interference and predicting the production potential of coalbed methane (CBM) wells. However, this issue has not been solved yet, and water sources are far from being completely understood. Stable water isotopes are important carriers of water source information, which can be used to identify the water sources for CBM wells. Taking the Zhijin block in the Western Guizhou Province as an example, the produced water samples were collected from CBM wells. The relationships between the stable isotopic compositions of the produced water samples and the production data were quantitatively analyzed. The following main conclusions were obtained. (1) The δD and δ18O values of the produced water samples were between −73.37‰ and −27.56‰ (average −56.30‰) and between −11.04&perm