A few comments, although I haven’t yet read the full article, as the link didn’t work for me:
If any official statement from any US-based oil company has said any such thing, IMO it is complete bullshit. Any given oil company will come to any agreement that is reasonably advantageous to them. If the Iraqi oil ministry (or a successor organization) chooses to take another approach rather than PSAs, at least some US-based oil companies will enter into agreements on those terms, as long as there is a reasonable expectation that they will profit from them. If no US-based company wishes to do business on those terms, undoubtedly there are other foreign-owned entities that will, and there is, or should be, no reason why the oil ministry cannot deal with them instead.
No. The industry is too highly integrated; even if US-based companies take over of Iraq’s production, there is no reason not to think that much of the produced crude will be sold on the open market to the highest bidder. Despite the size of Iraqi reserves, the country will not necessarily become the world’s swing producer; OPEC will still have a larger sway over the market, should they want to exercise that power (and there is no sign they do at present). Besides, once Iraq stabilizes and the Americans leave, which certainly will happen someday, Iraq could decide that it is in its best interest to join OPEC. Assuming they are indeed a petroleum exporting country by then, of course.
Anyway, in the previous thread on this subject, I believe the main bone of contention was whether the proposed PSAs were financially advantageous to the Iraqi government and people, and IIRC the consensus was, probably not. Nevertheless, even if US companies do end up producing the majority of Iraq’s oil, they would be operators only, not owners. Any Iraqi government with the spine to do so could alter the terms of any agreement to greater advantage at any time. Well, anytime there are significantly fewer than 100,000 US troops there, I guess.
Lastly, and I presume I’m stating the blindingly obvious here, if we are really attempting to impose a democratic system in Iraq, I always thought that a main feature of that system is a more or less free market environment. Trying to ram though sweetheart deals of the type referenced by the OP doesn’t seem all that democratic, does it?